get (the hell) out of Dodge
To leave or depart from a place, especially quickly or with marked urgency. A reference to Dodge City, Kansas, the clichéd setting of cowboy and western films from the early to mid-1900s. It looks like things are getting pretty tense in here, let's get out of Dodge! With our creditors becoming increasingly aggressive, we decided to just get the hell out of Dodge and leave it all behind.
get outta here
1. interjection An exclamation of surprise, disbelief, and/or incredulity. (Colloquial contraction of "get out of here.") Sally's brother is dating my cousin? Get outta here! You just won the lottery? Get outta here!
2. verb To leave or depart from a specific place. Also used as a command to do so. (Colloquial contraction of "get out of here.") I think we'd better get outta here, things are starting to look a little bit rough. Get outta here, you hooligans!