What is Unpro?
1.
Unprotected sex, usually while during a drunken hook up.
"Why does Steve look so sad today"
"Cause he totally had unpro with Jennifer last night, and she's banged ever dude on the football team. I bet she's dripping with the clap."
-or-
"I just drank five shots of Wild Turkey. Now I just gots to get some unpro tonight!"
See