Top definition
To fuck a girl so hard that her head goes through a wall, then your buddy on the other side of the wall sticks his dick in her mouth.
"Hey girl, whats wrong with your head?"
"I got Man Slammed."
"You should have been wearing your Viking Helmet."
by Urban Dictionary July 10, 2008
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2
Buttsex between two men
I'm gonna manslam John later
by Kuronekox January 12, 2015
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