A sexual act in which you are nailing a
chick missionary style without a condom, and just as you are about to cum you scream, "I'm CUMMING!" Just as you blast your wad, you elbow drop the girl in the face, knocking her out
cold. You then
run like hell.
"
Dude, remember that chick who was
drunk at the
party last night?"
"Yeah, I remember her. Did you nail her?"
"Hell yes, man, I gave her the Rock 'em Sock 'em! She won't remember who knocked her up!"