the shoving of ones ass (moon) into a womans face and holding in place until the face turns blue.
"last night jessica wouldn't give me a blow job, so i decided to give her a blue moon"
by herb alfred January 04, 2007
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when a guy moons you but they also pull their balls back between their thighs
Pat enjoyed giving everyone a blue moon
by C4 December 12, 2003
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A blue moon is a man's shaved buttocks. Preferably having shaven it using his girlfriend's razor.
"Hey, that's a nice blue moon you've got there."

"I can't go out tonight. I need some male grooming time, working on my blue moon."
by sally, that girl March 04, 2010
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To moon someone or a group of people, however with also pulling down your underwear or any undergarment, exposing both bare butt cheeks.
“Some random frat guy was drunk as hell last night and decided to blue moon us for no reason... we saw his harry asshole!”
by 69Escort4Hire69 February 27, 2019
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