blue moon

(adj.) A person who is extremely odd and weird, for ordering an ice cream that is almond flavored, yet colored blue.

Some boys are just so blue moon, they ask for your number, but never call you.

by Mk!at. June 26, 2008

blue moon

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 6, 2007

blue moon

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

Blue Moon

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 4, 2010

Blue Moon

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

once in a blue moon

To do something very rarely, once in a while.

I don't usually hang out here, just once in a blue moon.

by Roboot February 3, 2007

once in a blue moon

To do something on a very rare occasion.

Stephan will come to the office once in a blue moon.

by yurmix February 20, 2018