get out of Dodge
Definition from Wiktionary, the free dictionary
- (US, idiomatic) To leave; in particular to leave a difficult or dangerous environment with all possible haste.
- 1952-75 Taken from the radio and television series Gunsmoke, the phrase apparently "turned into youth slang in the mid-1960s, and became common by the 1970s" . Additional source here.
- 1988 United States Congress Senate Committee on Energy and Natural Resources. Subcommittee on Public Lands, National Parks, and Forests (page 94) 
- The pulp mills, he predicts, "are going to just high-grade all the best trees and get the hell out of Dodge
- 1999 -- The Cave Divers by Bob Burgess, Robert F. Burgess (page 298) 
- When Jasper surfaced, Skiles though to himself, Woody will come through. He'll find the way. He always gets us out of predicaments like this. Now that he's back it's just a matter or gearing up, getting in the water and getting the hell out of Dodge.