blow off steam

/B L OW1 AO0 F S T IY0 M/
verb
  1. 1

    To vent; to talk or take action (especially in a ranting or unrestrained way) so as to relieve stress.

    โ€œDon't take it personally when he shouts like that. He's just blowing off steam.โ€

  2. 2

    To do something to get rid of excess energy.

Source: https://en.wiktionary.org/wiki/blow%20off%20steam