Found 2 items, similar to Shack up.
English → English (WordNet)
Definition: shack up
shack up
v : room or live together; usually said of people who are not
married and live together as a couple [syn:
cohabit]
English → English (gcide)
Definition: Shack up
Shack up
\Shack" up`\, v. i.
1. to live together in a sexual relationship, without being
legally married. [Slang, U. S.]
[PJC]
2. to live in a cabin, shack, or other crude dwelling.
[Slang, U. S.]
[PJC]