shoot off (one's) face(redirected from shooting off their face)
shoot off (one's) face
To speak at an unwelcome time or in an inappropriate manner. You have no solutions and are only adding negativity to the situation, so quit shooting off your face! I'm sorry, but a dinner party is not the place for him to shoot off his face about politics.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.