Top Definition
RUAFI is an acronym for "aRe yoU A Fucking Idiot?"

Often the usage is rhetorical.

This can also be used as a statement of fact, rather than a question, by changing the order of the first two letters as in:
URAFI ("yoU aRe A Fucking Idiot")

This phrase is sometimes used on neowin.net to avoid the swear word filter and to skim the radar of the moderators who look for personal attacks.
xboxfan: I wonder how many PS3s it would take to heat my home?
jojo: RUAFI?
by fred666 November 20, 2006
4 Words related to RUAFI

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