Top Definition
Simply, the acronym or 1337 version of "R u fucking kidding me?"
Dude 1:Dude, wtf, he just pwned the whole terrorist team.
Dude 2: OMFG! Rufkm? H4X!
by BRow April 20, 2006
Shorthand (aka Tweethand or Texthand) for the emphatic incredulous query: "Are you fucking kidding me?"
Y: I couldnt get the food, bro', there was just too much traffic!
M: r u fkm? (with the car packed & ready for a trip up the coast.)
by wordphile0810 September 05, 2010

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