slapfight

/S L AE1 P F AY1 T/
noun
  1. 1

    A petty fight resulting in no long-term injury.

verb
  1. 1

    A petty, largely inconsequential fight.

Source: https://en.wiktionary.org/wiki/slap%20fight, https://en.wiktionary.org/wiki/slapfight