blow off (some) steam
To release strong emotions or energy by engaging in some kind of enjoyable, vigorous, or relaxing activity. I went on a run to blow off steam after our fight. When work gets frustrating, I like to go bowling to blow off some steam.
blow off (some) steam
and let off (some) steam tv. to release emotional tension by talking or getting angry. Let off some steam. Get it out of your system. The kids run around and let off some steam.