What Does TBR Mean? A Glossary of BookTok and Reading Terms

TL;DR: TBR stands for to be read: the list (or physical pile) of books you plan to read next. It is the most-used abbreviation in online book communities, alongside DNF (did not finish), ARC (advance reader copy), and a growing dialect of BookTok slang. This page defines all of them, grouped into tracking terms, community terms, publishing terms, and BookTok slang, so you can stop nodding along and start using them.

Every hobby grows a dialect. Runners have splits and fartleks, climbers have crimps and beta, and readers, especially the millions talking about books on TikTok and Instagram, have TBRs, DNFs, ARCs, and spice ratings. If you have ever watched a video captioned “DNFing my entire TBR after this book hangover” and understood maybe half of it, this glossary is for you.

The answer to the headline question first, then a quick-reference table, then the full glossary.

What does TBR mean?

TBR stands for to be read. It is the running list of books you intend to get to: a shelf in a reading app, a notes file, a spreadsheet, or a literal stack on the nightstand. Readers use it as a noun (“my TBR is at 340”), an adjective (“my TBR pile”), and sometimes a verb (“TBRed instantly”).

Two things worth knowing about the term. First, it almost always describes intention, not commitment. Nobody expects you to read your whole TBR, which is good, because adding a book takes two seconds and reading one takes ten hours, so most TBRs only ever grow. Second, the habit it names is much older than the abbreviation. Japanese has tsundoku, a Meiji-era word for buying books and letting them pile up unread, with a known usage from 1879. Readers have been building TBRs for at least 150 years. The internet just gave the pile a name and removed its physical limits.

If your own list has grown past the point of usefulness, we wrote a whole guide on how to organize your TBR, including when to declare TBR bankruptcy.

The most-searched terms at a glance

Term	Short meaning
TBR	To be read: your list or pile of intended books
DNF	Did not finish: a book you deliberately abandoned
ARC	Advance reader copy: a free pre-publication copy for reviewers
Buddy read	Reading the same book with someone, on a shared schedule
Readathon	A timed event where people read as much as possible
Book hangover	The inability to start a new book after an absorbing one
Mood reader	Someone who picks books by current mood, not by plan
HEA	Happily ever after: a romance ending guarantee
Trope	A recurring plot pattern, like enemies to lovers
Reading slump	A stretch where you cannot make yourself read at all

Full definitions below, grouped by where you will meet each term.

Tracking terms: words for how you read

These are the terms that describe your own reading: the lists, the logs, the habits.

TBR and mount TBR

Covered above: to be read. Mount TBR is the affectionate name for the physical version, the tower of owned-but-unread books, and also the name of a long-running challenge where readers commit to climbing it (reading only books they already own) instead of buying more.

Currently reading

Exactly what it sounds like: the book or books you are actively in the middle of. Most tracking apps make it a status alongside “want to read” and “read”. Watch the plural. A currently-reading shelf with nine entries usually means eight quiet DNFs waiting to be admitted.

DNF (did not finish)

A book you started and deliberately set down for good. Used as a verb (“I DNFed it at 30 percent”), an adjective, and a shelf label. The stigma around it has mostly collapsed; quitting the wrong book is how you find time for the right one, and we made the full argument in when it is okay to quit a book.

Reread

Reading a book you have already finished. Treated by some readers as wasted time and by others as the whole point. Rereads count. That is the entire entry.

Reading slump

A stretch, days to months, where you cannot make yourself read anything, even books you know you would enjoy. Usually caused by burnout, a wrong book you refuse to release, or life crowding reading out. Slumps are common and fixable; here is how to get out of a reading slump.

Reading streak

The count of consecutive days you have read, borrowed from language-learning and fitness apps. A streak turns “read more” into a tiny daily question: have I read today? Some readers find streaks motivating, others find them stressful; our guide to reading streaks covers both the psychology and the pitfalls.

Reading goal

A target for a period: books per year is the classic (the Goodreads Reading Challenge popularized it), but pages per day or minutes per day tend to work better because they reward long books instead of punishing them. More on picking a number that helps rather than nags in how to set a reading goal.

Reading log / reading journal

A record of what you read and what you thought: dates, ratings, quotes, notes. Paper journals and apps both work; the point is that memory does not. If you finish books and forget them within a month, a log is the fix, and we cover the method in how to remember what you read.

TBR jar

A jar of paper slips, each with a book from your TBR. When you cannot choose, you draw one. Low-tech, oddly effective, because it deletes the decision entirely.

Most of the tracking vocabulary above maps onto actual features somewhere. In booksense, a free iOS reading app, your TBR is a shelf, your streak and goals are tracked from timed reading sessions, and your reading log builds itself from page-anchored notes; readers there have logged 480K+ minutes and 16K+ notes so far. If half this glossary describes things you already do in a notes app, that is the sign you would get something out of a tracker.

Community terms: words for reading together

Buddy read

Two or more people reading the same book on a shared schedule and talking about it as they go. Looser than a book club: no fixed membership, no meeting, often just a group chat that lights up at the plot twist. The pace agreement is the whole structure (“through chapter 12 by Sunday”).

Book club

The formal version: a recurring group that reads one chosen book per cycle and meets to discuss it. Book clubs predate the internet by a couple of centuries and survived it comfortably.

Readathon

A timed event where participants read as much as possible: 24 hours, a weekend, a month. Some are personal challenges, many are community events with prompts and check-ins. The best-known is Dewey’s 24 Hour Readathon, running twice a year since 2007.

Book hangover

The state after finishing a book so absorbing that starting anything else feels wrong. Symptoms: rereading the ending, hunting for fan discussions, staring at your TBR with no appetite. It passes. A short, completely different book is the usual cure.

Mood reader

A reader who chooses the next book by current mood rather than by plan. Mood readers famously cannot follow a fixed TBR queue; hand one a schedule and the scheduled book instantly becomes homework. The term is usually self-applied, half apology and half identity.

Auto-buy author

An author whose new releases you buy without reading the synopsis, reviews, or sometimes even the title. The highest compliment a reader gives. Most readers have two or three.

BookTok, bookstagram, BookTube

The book communities on TikTok, Instagram, and YouTube respectively. BookTok is the one reshaping publishing: TikTok reported in March 2026 that more than 75 million posts have used the #BookTok hashtag globally, and that BookTok-recommended books sold over 50 million copies across Europe in 2025, generating around 800 million euros. When a bookstore has a “as seen on BookTok” table, this is why.

Publishing terms: words from the industry

ARC (advance reader copy)

A free, pre-publication copy of a book, sent by the publisher to reviewers, booksellers, librarians, and increasingly to BookTok and bookstagram creators, to generate early reviews and buzz. Also called an advance review copy or, in older industry usage, a galley or advance copy. ARCs are not final: expect typos, placeholder formatting, sometimes an unfinished cover. “ARC reader” describes someone who regularly receives them in exchange for honest reviews.

Backlist and frontlist

A publisher’s frontlist is its new and upcoming releases, the books getting marketing money right now. The backlist is everything older that remains in print. Backlist sales are the quiet engine of publishing, and “backlist gem” is reader-speak for an older book that deserves frontlist attention.

Blurb

Confusingly, two things: the promotional endorsement from another author on the cover (“A triumph!”), and, in casual reader usage, the synopsis on the back of the book. Context tells you which.

Galley / proof

Near-synonyms for ARC: early printed or digital versions of a book produced before final corrections. “Digital galley” usually means an e-ARC distributed through services like NetGalley.

BookTok slang: mostly romance, all useful

BookTok’s biggest genre is romance, so much of its slang comes from there. These terms now show up across the whole community.

Trope

A recurring plot pattern or relationship dynamic: enemies to lovers, fake dating, found family, grumpy meets sunshine, only one bed. Tropes are not clichés in this usage; they are search terms. Many readers pick books by trope the way others pick by author.

HEA and HFN

HEA is “happily ever after”, HFN is “happy for now”. In romance these are near-contractual: the genre’s core promise is that the central couple ends the book together. A romance-labeled book without an HEA or HFN will genuinely anger readers, which is why the abbreviations appear so often in reviews.

Smut and spice ratings

Smut is reader shorthand for explicit sexual content, used cheerfully rather than pejoratively. Spice measures how much of it a book contains, usually on a one-to-five scale rendered as chili pepper emoji. One pepper is closed-door romance; five is, well, five. The scale is entirely informal and calibrated differently by every reviewer, which everyone involved understands and nobody minds.

Slow burn

A romance (or any relationship arc) that takes most of the book to ignite. Praised when the tension is deliberate, cursed at when it is padding. Frequently paired with a trope tag: “enemies to lovers slow burn” is practically its own genre on BookTok.

FMC and MMC

Female main character and male main character. Review shorthand: “the FMC deserved better” saves a sentence of setup.

Ship

To root for two characters to end up together, from “relationship”. Comes with its own grammar: you ship them, the pairing is a ship, and a ship that becomes canon has sailed.

Book boyfriend

A fictional character a reader is at least semi-ironically in love with. The plural is where TBRs come from.

Do you need any of this vocabulary to be a reader? No. Plenty of people read forty books a year and have never said “FMC” aloud. But if you spend time where readers gather online, these terms are the price of admission, and now you have them.

FAQ

What does TBR mean?

TBR stands for “to be read”. It is the list or pile of books you intend to read, and readers use it as a noun (“my TBR is out of control”), an adjective (“my TBR shelf”), and occasionally a verb (“I TBRed it immediately”).

What does DNF mean in books?

DNF stands for “did not finish”. It marks a book you started and deliberately chose to abandon, and it works as a verb too: “I DNFed it at 30 percent.” A DNF is a decision about fit, not a failure.

What is an ARC?

An ARC is an advance reader copy (sometimes advance review copy): a free, pre-publication copy of a book that publishers send to reviewers, booksellers, librarians, and content creators to build early reviews and buzz. ARCs are not final versions and may still contain errors or placeholder covers.

What is a buddy read?

A buddy read is two or more people reading the same book at the same time, usually on an agreed schedule, and discussing it as they go. It is smaller and looser than a book club: no fixed membership, no formal meeting, just company inside the same story.