What is Cockcussion?
1.
When a man inserts his penis into a woman's mouth, then thrusts it back and forth in a vigorous "skull-fucking" manner, giving the woman a terrible headache, or sensation of having recieved a concussion.
"Hey Mike, do you get any from that fat chick last night?"
"Nah, I waited till she passed out then gave her one hell of a cockcussion."