RTFM

RTFM /R-T-F-M/ imp.  [UNIX] Acronym for `Read The Fucking
   Manual'.  1. Used by {guru}s to brush off questions they
   consider trivial or annoying.  Compare {Don't do that, then!}.
   2. Used when reporting a problem to indicate that you aren't just
   asking out of {randomness}.  "No, I can't figure out how to
   interface UNIX to my toaster, and yes, I have RTFM."  Unlike
   sense 1, this use is considered polite.  See also {FM},
   {RTFAQ}, {RTFB}, {RTFS}, {RTM}, all of which mutated
   from RTFM, and compare {UTSL}.