Definition of drunk tank noun from the Oxford Advanced Learner's Dictionary

 

drunk tank

 noun
noun
BrE
 
; NAmE
 
(informal, humorous, especially North American English) The police
 
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a place where people are put by the police because they are drunk He spent the night in the drunk tank. The police left the teenagers in the drunk tank. See related entries: The police
See the Oxford Advanced American Dictionary entry: drunk tank