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6.
To remove your body from any chair, sofa, lounger or seated area
Hey, unass my seat before it gets serious up in here!
by JKEN1 September 24, 2012
 
1.
To leave or vacate quickly.
We decided to unass that place when the shells started falling.
by Russ McClelland December 16, 2003
 
2.
to give up. to relinquish
You better unass your half of rent money before I start pawning your shit.
by j- October 21, 2003
 
3.
1. To immediately leave a hostile area when either compromised or under fire. (Used extensively by US Special Ops)

2. To leave an undesireable area very quickly
- "The Black Hawk dusted us in and before we knew it, the place was crawlin' with bad guys. My team leader immediately called them back to un-ass us."

- "The party sucked. We un-assed."
by ovits December 19, 2005
 
4.
verb.
to surrender completely without restraint
you better unass some of that chute!
by convict in dat ass March 22, 2004
 
5.
When playing paintball: To give up without a fire fight, being barrel tagged, or shot with a Nerf.
"The crew will be very unlikely to unass their tank...ever!"
by Bluemax February 06, 2008