rtfmotd
Acronym for "Read the Fucking Message of the Day". Used in the game Counter-Strike, in which players can say "motd" to read the message of the day, often containing server rules and other important information.
Player: Hey is cussing allowed on this server?
Admin: RTFMOTD
Player: motd
(reads)
Player: Oh, okay - thanks.
Admin: RTFMOTD
Player: motd
(reads)
Player: Oh, okay - thanks.