- to live together as spouses without being legally married.
- to have illicit sexual relations.
- to live in a shack: He's shacked up in the mountains.
Origin of shack1
Definition for shack (2 of 2)
verb (used with object) Informal.
Origin of shack2
Examples from the Web for shack
For many, many good reasons, school is not an ideal time to shack up with your soul mate.Dear Princeton Mom, Stop Telling Me To Husband-Hunt|Emily Shire|February 14, 2014|DAILY BEAST
Heading into the small makeshift kitchen inside his shack he retrieved a large jar of polenta.Two Chickens, an Old Guitar, and a Group of Strangers: A Life-Changing Feast in Brazil|Annabel Langbein|November 29, 2013|DAILY BEAST
“Yet on May 23, 1976, a Sunday morning, 300 heavily armed soldiers with police vans surrounded our shack,” writes Jalics.
So duck into parm and sandwich Little Italy and NOLA together, or grab him a burger from the shack where the lines take forever.Band of Outsiders Stages Scavenger Hunt for Fall 2013 Collection|Misty White Sidell|February 8, 2013|DAILY BEAST
Supermodel Roommates: Models Cara Delevingne and Georgia May Jagger are about to shack up….Marc Jacobs for Diet Coke, Delevingne and Jagger Shack Up|The Fashion Beast Team|February 6, 2013|DAILY BEAST
Yet she looked again at his shack, with her lower lip in the bite of her teeth.The Peace of Roaring River|George van Schaick
The little party now proceeded to creep around to the front of the shack.The Banner Boy Scouts Snowbound|George A. Warren
Even this did not waken him, though he thought he was back at the shack by the tar kiln.Ralph Granger's Fortunes|William Perry Brown
They passed down the pine-covered path slowly, and as they neared Gaston's shack, Filmer paused.Joyce of the North Woods|Harriet T. Comstock
Early in the afternoon, on looking out the shack door, I saw a tangle of clouds on the sky-line.The Prairie Wife|Arthur Stringer