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."

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!”

Blue Moon by 69Escort4Hire69 February 27, 2019

Blue Moon 

A map in Flood Escape 2. Blue Moon is one of the two maps ranked 'Crazy' in difficulty. It's often argued about whether Blue Moon or Poisonous Chasm is harder, even though they are the same difficulty. It's hardly ever reached, as the 'Insane' difficulty levels are usually the limit.

Some people think Blue Moon is harder, while others think otherwise.

Blue Moon by CryptoDefiner573 May 29, 2021

Blue Moon 

An extremely fast-paced FE2 crazy map with the famous cheese lava.

OH MY GOD, I JUST BEAT BLUE MOON
............
YESSSSSS!!!!!!!!!!

Blue Moon by BladeX123uWu December 6, 2022

Blue Moon Phasing 

When one switches between drinking Original Blue Moon and its Seasonal Option.

Nothing much, just sittin' here, blue moon phasing.

Blue Moon Phasing by Mr. Stalwig May 7, 2011

Blue Moon Gay 

A straight guy who desires to have his cock sucked once in a blue moon. Comes from the cliché, "once in a blue moon," which means a very rare event.

Gay #1: So I blew this straight guy yesterday behind the bar
Gay #2: Are you sure he's straight?
Gay #1: Yes; he's married and have kids
Gay #2: Hmm ... must be a blue moon gay

Blue Moon Gay by TheBEEB April 7, 2010

Blue Moon Payday 

When you get payed every other week and receive 3 paychecks in a month instead of the normal 2.

Payday falls on the 1st this month, looks like we're getting a blue moon payday, fuck yeah.

Blue Moon Payday by Nadonado April 12, 2021