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general::
Phrase(s): sleep on something
1. Lit. to recline on something and slumber. • I like to sleep on a firm bed. • Mary had to sleep on the floor because her sister was visiting. 2. Fig. to postpone a decision until one has slept through the night. (As if one were going to think through the decision while sleeping.) • It sounds like a good idea, but I’d like to sleep on it before giving you my response. • You go home and sleep on it and give me your answer in the morning.
McGrawhill's American Idioms And Phrasal Verbs