sober up
verb
- to become sober or less drunk or to make (a drunk person) sober or less drunk
Wiktionary
verb
- To become sober; to cause to become sober (usually in terms of alcohol or drugs; sometimes figuratively).
“She's in no state to go home by herself, so make sure she doesn't drink anything else, and she'll soon sober up.”
“A pot of black coffee ought to sober him up.”