Top Definition
ymf
ymf mean's "you mother fucker".When someone make you angry you say YMF or something....
person 1:Hey man,I think you are stupid.
person 2:What did you say?
person 1:Really I think you are stupid!
person 2:YOU YMF!!!
#noob #omg #wtf #mom #lol #stupid
by DarkXQXFlame March 29, 2010
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