Tight, stretchy pants meant to show-off one's ass. Typically worn by college hoochies out clubbing.

when you're hungover as shit after a spending a night drunk as a skunk

Pants that are used to cover the asscheek(s) and asshole. Most of the time it is used to cover dick/vagina/both. Sometimes used as napkins after masturbation.

A word used in Beck's train of thought surreal song Hotwax from the album 'Odelay'. His train of thought was kinda Kenny Rogers, barflys and stretch wrangler jeans in the mood to impress. Eeewww....

An assbag so extensive that it has to be made into an entire pair of pants.

Pants that has the back end or seat of them cut out where it will show your bare ass. Ass pants are always worn without underwere.
Often worn by queers.
Also worn by women when they want to show off there ass to men.