act up

/ækt əp/
/ækt əp/
IPA guide

Other forms: acting up; acted up; acts up

Definitions of act up
  1. verb
    misbehave badly; act in a silly or improper way
    “The children acted up when they were not bored”
    synonyms: carry on
    see moresee less
    type of:
    misbehave, misconduct, misdemean
    behave badly
  2. verb
    make itself felt as a recurring pain
    “My arthritis is acting up again”
    see moresee less
    type of:
    ache, hurt, smart
    be the source of pain
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