fung ku Share definition Flag A rather obvious mockery of "kung fu", meant to discriminate those who can kick your ass, and to tempt them to do so. "aww, look at the cute fruit head, doing his fung ku! HAHA!" fung ku by for all you know its "Bill" March 17, 2005 0 0 Get merch Get the fung ku mug. Buy Now — $32.95 See more merch