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Definition of monkey business noun from the Oxford Advanced Learner's Dictionary

monkey business

noun

/ˈmʌŋki bɪznəs/

/ˈmʌŋki bɪznəs/

[uncountable] (informal)

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dishonest or silly behaviour
- There’s been some monkey business going on here.

See monkey business in the Oxford Advanced American Dictionary

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noun

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