Definition of 'act up'
Example sentences containing 'act up'
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She began to play truant and acted up at home. The Sun (2015)Surely none of them could possibly be acting up just for the cameras? The Sun (2009)Agree with your partner how you are going to set boundaries for your stepson when he acts up. The Sun (2013)Use the camera all the time so the family is used to it and stops going shy or acting up. Times, Sunday Times (2007)
Definition of act up from the Collins English Dictionary
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