let off steam BrE
blow off steam AmE

There was no way for any of the inmates to let off steam.

Such statements may simply be a matter of letting off steam.

"And as you probably know better than anyone else on board, dreams are just a way of letting off steam."

I try to let steam off by walking and playing golf.

"You have got to relieve the pressure and let off steam at the right time," said Johnson.

Yet isn't that the way a lot of families let off steam?

Sport was a way to let off steam for her.

To let off steam, they used to call each other up.

Sometimes it was just a winter ritual to let off steam.

Because everyone said that children in Manhattan need to let off steam and have fun for a change.