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1.
To leave, bust out, split, or otherwise vacate the premises.

Ref: In aviation, chocks are blocks placed under a plane's wheels to prevent its rolling away when parked. Hence, to "pull chocks" is to remove said blocks, allowing the aircraft to taxi to the runway and take off.
1: Hey dude this place is dead - whaddya say we pull chocks and try somewhere else?

2: Well fellas, it's getting late, so I think I'm about ready to pull chocks.
by usnav8rbandit January 17, 2010