shack

US /ʃæk/
UK /ʃæk/
1.

move in or live with someone as a lover.

:
•
they won't believe I've shacked up with someone so good-looking
:
cohabitlive withlive togetherlive in sin
1.

a roughly built hut or cabin.

:
hutshantycabinlean-toshedhovelbothyshielingtilthumpyhoganwickiupfavelashebang