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English definition of “be playing at sth”

be playing at sth

UK phrasal verb with play     /pleɪ/ verb
If you ask what someone is playing at, you are angry because they are doing something silly: What do you think you're playing at!Bad and wrong behaviourDisobedientObeying and breaking the lawObedient and compliant
(Definition of be playing at sth from the Cambridge Learner's Dictionary © Cambridge University Press)

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