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 somewhat small lunar body that will crash onto Termina, unless it is stopped in three days by Link, the Hero of Time. It is being brought down by Skull Kid, using the power of Majora's Mask. Also has a really constipated face.

A situation in which one is feeling great, not illegally induced, but more of a blissful and innocent happiness.

refers to one of the holiest of nights in Mittagong, NSW when the sight of a moon appeared inside the dorms at about 2AM. The moon lit up the room while making noises and filling it with its own special scent. The Moon will forver be a sacred memory

When you smoke a lot and your really high, you land on the moon.

The act of spending time obsessing over something or someone. Like a crazy person, covering their walls with pictures of this other person, or constantly going on about him/it/her, so much so that the slightest reference to this object person drives everybody else crazy.

Somebody who has a perfectly round head