cumball noun2 •(slang, vulgar) A ball or wad of semen or vaginal fluid.Let him pump you good, and shoot a fucking hot cumball in your guts. You fucking pieces of shit. — 1998 •(vulgar, offensive) Fuckwad, a term of contempt.>Go away, cumball, your presence is not needed here. Cumball? What's next? Cuntball? Fuckball? Seriously, your *ball insults are getting boring. — 1998 formscumballs