a soft scrotal glue, produced by aggresive fondling and/or stroking of an engorged phallus, that hardens on setting, usually upon an enthused female's body; excellent for attaching random items to one's partner
"Yo Chad! You should've been there last night! I Supermanned Karen with some of my Grade A cument!"
When you have multiple back-to-back sex sessions, you can’t remember where he came.
Lilly: Me and old mate fucked non-stop last night.
Amanda: That’s hot! Where did he cum?
Lilly: Uh, gosh! I can’t remember. We did it so many times, I’ve got cumentia.