shack up

动词 shack up:

1. room or live together; usually said of people who are not married and live together as a couple
   同义词：cohabit

1. He was looking for a dame to shack up with when the police picked him up.
   他正在找女人鬼混的时候，警察把他逮住了。
2. They've decided to shack up together in her flat.
   他们决定在她的公寓里同居。