mouth off

verb

1. informal.
   to give an opinion or speak emotionally, often without much care or consideration

Example Sentences

“I can share with Max as well some of the pet peeves that officials may have as far as player misconduct or coach misconduct or maybe mouthing off too much,” he said.

From Seattle Times

In the Catholic private schools as a young girl mouthing off to the nuns.

From Salon

De Groft said he did not recall writing the 2022 email about “30 percent” and fancy cars, adding that “there’s nothing illegal about mouthing off.”

From New York Times

You'll recall a couple of weeks ago that it was reported Trump had shot his mouth off to a foreign businessman about the United States' nuclear submarine capabilities.

From Salon

Before another man runs his little mouth off to the press, ask yourself: why are we, including women and nonbinary people, so quick to believe men and not women?

From Salon