A man's asshole. Every man's
got an asshole, so every man's
got a mancunt. In
common speech, can be shortened to cunt.
Dude 1: My
date stuck her
finger in my mancunt when I fucked her yesterday.
Dude 2: Just one?
Dude 1: Yeah. My cunt's tight.
Dude 2: My girl does me with two or three fingers.
Dude 1: She only do that when you're fuckin her?
Dude 2: No. Anytime. She plays with my asscunt
like I play with her pussy.