yochum Share definition Flag when your are having sexual experiences with a black woman, and you want to tell her when you are about to blow... you scream YO CHUM!!!! I nutted in that girls mouth and scream YOCHUM like it was my job yochum by penisfriction May 23, 2007 0 0 Get merch Get the yochum mug. Buy Now — $32.95 See more merch