double up 与他人共用（尤指房间）；（因大笑、剧痛等）弯腰

【例句】
They only have one room left, you'll have to double up with Pikachu.
他们只剩下一个房间，你只好与彼得合住了。

They laugh so hard they double up with laughter.
他们捧腹大笑，直不起身来。