double up 1. 折叠(纸、 页等)；(纸、 页等)折起来 2. (使)(因剧痛或大笑等而)弯着身子 She doubled up in pain. 她痛得弯着身子。 He received a blow in the stomach which doubled him up. 他的肚子上挨了一拳，使他痛得直不起腰。 3. 使弯曲；握紧(拳头等) He doubles up his left fist and starts towards him. 他握紧左拳，朝他扑去。 4. 同宿一室；合睡一床 Some of the guests had to double up. 有几位客人只得同宿一间屋子。 5. 〈英〉把原赌注和赢得的钱一同作为赌注押下