Any person who shows no emotion, no facial expression, and makes absolutley no eye contact during intercourse. They basically just lay there completley dead weight, "not having sex", acting like a total nun about it.
"Dude, how was last with Andy?"

"I cannot believe I had to fake blowing my load, she was a total nun fuck dude."
by x_vacant@hotmail.com March 29, 2008
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Nun fucking says what it means.
We broken into the nunnery last night, fucked all the nuns. Hillbillies love nun fucking. We broken into the nunnery last night, and fucked all the nuns. The church locked it's doors when they saw me coming.
by Iam not Elmer Fudd March 6, 2020
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