double up

同宿一屋； 把 ... 对折； 弯着身子

verb

1. stake winnings from one bet on a subsequent wager

Synonym: parlay

2. bend over or curl up, usually with laughter or pain

e.g. He doubled and vomited violently

Synonym: double overdouble

3. share a room or a bed designed for only one person

1. (因大笑、剧痛等)（使）弯腰，（使）弓身
If something doubles you up, or if you double up, you bend your body quickly or violently, for example because you are laughing a lot or because you are feeling a lot of pain.

e.g. ...a savage blow in the crutch which doubled him up...
对他下身凶狠的一击疼得他直不起腰
e.g. They laugh so hard they double up with laughter.
他们捧腹大笑，直不起身来。

2. see also: double

Because of the housing shortage many couples had to double up in one tiny apartment.(由于住房紧张，许多对夫妻只好挤在一栋小公寓里。)

We should try to double up the amount of intimacy we have in marriage.(我们应当努力让我们婚姻中的亲密之量翻倍。)

We'll have to double up on books; there aren't enough to go around.(因为书不够人手一册，我们只好合用了。)

We shall have to double up the sheets to get them in the drawer.(我们得把这些被单折叠起来才能放进抽屉里。)

You may not double up on Sagas, although Special Characters do not count towards this.(你不可以叠加传说，特殊人物不在此例。)

Tens of thousands of families were forced to double up in homes and apartments.(多少万家庭被迫和别人挤住在一间住宅或公寓内。)

Jeff: If you were smart you would celebrate both new years so you could double up on the number of parties.(杰夫：如果你聪明你就会庆祝两个新年，这样你就可以参加双倍的派对！)

The carpet is too thick to double up.(地毯太厚，折不起来。)

Walls were replaced by a series of timber structures, which double up as shelving and storage units.(墙体被一系列木结构所代替，并对折起来作为架子和储藏空间。)

Tom and Bill will double up in room 20.(汤姆和比尔住二十号房间。)