Definition of cut up in English:

cut up

phrasal verb

  • 1North American Behave in a mischievous or unruly manner.

    ‘kids cutting up in a classroom’
    • ‘‘She was kind of getting a little antsy in there, there was a couple of horses cutting up,’ Bourque said.’
  • 2(of a horse race) have a particular selection of runners.

    ‘the race has cut up badly with no other opposition from England’