RTFM is an abbreviation, expanded as “Read The Fucking Manual,” that originated in Unix and hacker culture as a curt response to a question whose answer is already in the documentation. The Jargon File, the lexicon of hacker slang maintained by Eric S. Raymond, records two distinct senses. In the first, it is used by gurus to brush off a question they consider trivial or annoying. In the second, it is used by a person reporting a problem to signal that they have done their homework, as in the polite example: “No, I can’t figure out how to interface Unix to my toaster, and yes, I have RTFM.”
The two senses reveal the tension at the heart of the phrase. Hacker culture grew up around systems with thick, authoritative manuals, the Unix man pages most of all, and a strong norm that you were expected to consult them before asking another human. RTFM enforces that norm. Used by an answerer, it is a rebuke; used by an asker, it is a credential. The Jargon File entry notes a family of related mutations that grew out of it, including RTFS (“read the source”), RTM (the manual, without the expletive), and the search-era successor STFW, “search the web.”
As a piece of culture, RTFM marks the dividing line between a self-help community and a service desk. The ethic it encodes, that competent people find answers themselves and reserve other people’s time for genuinely hard questions, was central to how early online technical communities scaled with no paid support. It is also why those communities acquired a reputation for hostility. A newcomer asking a documented question and receiving “RTFM” in reply experiences gatekeeping, not help.
That friction never fully went away; it migrated. The same dynamic plays out on modern question-and-answer sites, where a question is closed as a duplicate or flagged as one the manual already answers. RTFM endures because the underlying problem it addresses is permanent: documentation exists, people do not always read it, and a community that answers every already-answered question drowns in repetition. The phrase is the blunt, slightly hostile instrument the culture invented to manage that load.