Mixing one's cum with sand, cement, and gravel that creates a form of concrete with cum instead of water. Great for building, just not for one's family or friends.
Damn bro, y'all are using concrete to pave roads, while I'm using cumcrete. Yeah, I was banned from the sperm bank.
They have one of the coolest usernames out there i am so goddamn jealous that they thought of it first >:/ BUT I LOVE THEM SM. THEYRE SO COOL AND HOT AND EVERYTHING