V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

RTFM
       Read The Flaming / Fucking Manual (slang, Usenet, IRC)


The Jargon File (version 4.4.7, 29 Dec 2003):

RTFM
 /R?T?F?M/, imp.

    [Unix] Abbreviation for ?Read The Fucking Manual?.

    1. Used by gurus 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, STFW, RTM, all of which
    mutated from RTFM, and compare UTSL.


The Free On-line Dictionary of Computing (30 December 2018):

RTFM

    /R T F M/ Read The Fucking Manual (always
   abbreviated, sometimes bowdlerised to "Fine" or "Friendly") An
   (unhelpful) guru's traditional response when someone asks a
   question in a newsgroup or mailing list which he could
   have easily answered for himself had he bothered to RTFM.

   The term may also be used to indicate that you couldn't find
   the answer in the manual.  E.g. "How do I interface Unix to my
   toaster?  And yes, I did RTFM but the FM didn't help and I
   can't RTFS."

   Other derived forms include RTFAQ, RTFB, RTM, RYFM
   and, more recently, STFW.  Compare: UTSL.  A web site in
   the same vein is (lmgtfy.com).

   [Earliest use?]

   [Jargon File]

   (2003-06-07)