act up Meaning in the Cambridge English Dictionary Cambridge dictionaries logo
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Meaning of “act up” in the English Dictionary

"act up" in British English

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act up

phrasal verb with act uk   /ækt/  us   /ækt/ verb
(Definition of act up from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"act up" in American English

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act up

phrasal verb with act  us   /ækt/ verb
  • (BEHAVE BADLY)

to ​behavebadly: The little ​girl was acting up, so her ​mother took her out of the ​restaurant.

act up

phrasal verb with act  us   /ækt/ verb
  • (OPERATE BADLY)

to ​operatebadly: My ​car is acting up again - I don't ​know what's ​wrong with it.

act up

phrasal verb with act  us   /ækt/ verb
  • (BECOME ACTIVE)

to ​becomeactive: Her ​allergies acted up when she went ​hiking in the ​woods.
(Definition of act up from the Cambridge Academic Content Dictionary © Cambridge University Press)
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“act up” in American English

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