to pull your pants down and show your bare ass to unexpecting people.

(n.) a natural sattelite of the earth, made of cheese.

(v.) The act of going on stage at an astronomy convention, pulling down your trousers, opening your 'cheeks' and saying

"hows this for a black hole?"

1. the buttocks

2. to display one's nude buttocks

Not the (original) Death Star.

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.

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.

A thing that has been blown up at least 200 times in the DragonBall series. Believed to have revolved around the earth prior to its destruction(s).