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Phrase(s): sleep together
1. [for two or more people] to share a bed. • Do you mean that Fred and Dave have to sleep together? • My brother and I used to have to sleep together. 2. Euph. [for two people] to copulate. • Do you think they slept together? • Ted and Alice slept together a lot when they were in college.
McGrawhill's American Idioms And Phrasal Verbs