Meaning of “deuce” in the English Dictionary

british dictionary

"deuce" in British English

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deucenoun [ U ]

uk /djuːs/ us /duːs/

the score in tennis when both players have 40 points

the word for "two" in some card and dice games

the deuce old-fashioned informal

used in questions to express anger or surprise:

What the deuce do you think you're doing?

(Definition of “deuce” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)