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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!
by bowflecks June 25, 2009
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