RTFM
acronymops culture
Stands for: read the fine manual
The support-culture retort telling an asker the answer is already in the documentation.
Canonized by the Jargon File, RTFM carries hacker culture's core covenant: respect for other people's time, and the expectation that you search before you ask. The polite expansion uses 'fine'; everyone knows the original. Modern communities soften it into 'let me link you the docs', but the underlying norm, do your homework first, is unchanged.
Also known as: read the manual