sleep it off
sleep (something) off
To reduce or rid oneself of some unpleasant condition by getting extra sleep. 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.
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.