sleep it off
sleep off
To reduce or rid oneself of some unpleasant condition by getting extra sleep. A noun or pronoun can be used between "sleep" and "off." He drank a bit too much, but he'll be fine—he just needs to sleep it off. I think I'll head home early and try to sleep off this head cold.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
sleep it off
tv. to sleep while the effects of drugs or alcohol wear off. I’m polluted, I guesh. Have to get home and sleep it off.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.