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English definition of “get up to sth”

get up to sth

UK phrasal verb with get     /ɡet/ verb (present participle getting, past tense got, past participle got, US gotten)
to do something, especially something that other people think is wrong: She's been getting up to all sorts of mischief lately.Bad and wrong behaviourDisobedientObeying and breaking the lawObedient and compliant
(Definition of get up to sth from the Cambridge Learner's Dictionary © Cambridge University Press)

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