K.O.C. Share definition Flag K.0.C.:abbreveation (King Of Comebacks) A sarcastic term named to a person who can't make comebacks from insults worth shit. Asshole-fuck you, your a shithead. You-yeah, yeah, well,....uh......YOU ARE! friend-Nice one K.O.C., you scared the shit out of him! K.O.C. by Enzo March 30, 2004 Get the K.O.C. mug.