Definition of “sober (sb) up” - English Dictionary

british dictionary

“sober (sb) up” in British English

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sober (sb) up

phrasal verb with sober uk /ˈsəʊ.bər/ us /ˈsoʊ.bɚ/ verb [ I or T ]

to become less drunk, or to make someone become less drunk:

I went for a walk to try to sober up.
Have some black coffee - that should sober you up!

(Definition of “sober (sb) up” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)