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, RTM, all of which mutated from RTFM, and compare UTSL.