What does "shack" mean?
shack up
- Slang to live or room (in a certain place)
- to live (with one's mistress or paramour)
See shack in American Heritage Dictionary 4 Idioms
shack up
Slang - To sleep together or live in sexual intimacy without being married.
- To live, room, or stay at a place: I'm shacking up with my cousin till I find a place of my own.
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