muafuca Share definition Flag Someone who is saying the word motherfucker but does not have front teeth or enough gramatical usage to pronounce English words correctly I wuz ridin thru 9law7town8 b4 isz muafuca stopd' me3 whilez Iz gettin crunk. muafuca by kristinn August 7, 2006 0 0 Get merch Get the muafuca mug. Buy Now — $32.95 See more merch