moon 

1. the buttocks

2. to display one's nude buttocks

Jim got sent to the principal's office for mooning in school today.

moon by Light Joker December 14, 2004

moon 

the act of showing ones naked ass for pleasure or any other stupid reason. usually done by fucktards and other equally stupid persons.

also is the big round bright thing you see on the skies at night. also a name.

When you weren't looking, the faggot pulled down her pants, bent over, and mooned you.

moon by Your local Blasian February 15, 2009

Moon 

The white or grey thing that you see at night if you look at the sky.

Americans first land on the moon.
In Russia=
General- Soldier! You are going to fly to the sun tomorrow to show that we are better than those americans!
Soldier-Sir! But I'll burn!
General- Do you think I'm so stupid! You will fly at night!

Moon by Rosti May 1, 2003

moon 

Other than its use as a noun (our moon) and a verb (to moon someone), 'moon' can be used as a way to say goodbye. It is short for "See you on the moon", a pseudo-common way to say goodbye.

Tim: Alright man, I have to leave.
Eric: Ok, we'll see you.
Tim: Yep, moon.

moon by Timmy Sanders January 3, 2008

moon 

the moon

look at the moon

moon by I, Me and myself September 30, 2020

moon 

to bend over and bare the rump to someone as a sick joke. Also,as a noun,a bared rump exposed as a sick joke.

"A jacket is better than an overcoat,because you can moon people with your coat on, that way!" said Kenny,Kevin,Uriah,Harun,Jamie,Matt,Robert,Bill,Jim,and Tom,as they pulled down their pants and exposed their moons.

"Oh,come on! We're not mooning you,we're only showing you where poo comes from,little kid!" exclaimed David,Greg,and Mel,as they pulled down their pants and exposed their moons to the little kid. They really were mooning the child.

moon by JMC70 December 14, 2016

Moon 

Somebody who has a perfectly round head

Kieran Allsop=moon

Moon by Andrew Pitcher January 21, 2009