When a mans semen is applied by whatever method to his stomach so that his stomach hair becomes pasted to his skin.
My boyfriend Karl didn't warn me he was going to cum and blew a giant load on my hands, so I wiped it all over him and laughed because he had cum stomach... He tried to hug me, but I got away, cum stomach is for boys!
In essence; the simplicity of the fact is that an individual of hebrew descent becomes withdrawn from the presence of cum (saqueek material) for an extended amount of time, side effects may include bitchiness, frequent mood swings, and most devasting implosive diahrea shits mankind has bear witness to.