shoot your mouth off

shoot (one's) mouth off

1. To speak without discretion; to speak too loudly or freely, especially about sensitive topics or information. We would have gotten away with our plan if your dumb cousin hadn't started shooting his mouth off all over town. I figured it went without saying that I didn't want to talk about my divorce at Daniel's wedding, but you just had to go and shoot your mouth off like that!
2. To be annoyingly or overbearingly talkative, especially in a bragging or boastful manner. There's some guy at the other end of the bar shooting his mouth off about how far he can throw a football.
See also: mouth, off, shoot
Farlex Dictionary of Idioms.

shoot your mouth off

INFORMAL
1. If someone shoots their mouth off, they boast about their skills and qualities. He'd been shooting his mouth off saying he could sing, when of course, he couldn't.
2. If someone shoots their mouth off, they talk publicly about something which is secret. No one with any sense goes shooting their mouth off about their private affairs to the tabloids. A respected lawyer, she ought to know better than to go shooting her mouth off like this in public.
See also: mouth, off, shoot
Collins COBUILD Idioms Dictionary, 3rd ed.

shoot your mouth off

talk boastfully or indiscreetly. informal
See also: mouth, off, shoot
Farlex Partner Idioms Dictionary

shoot your ˈmouth off (about something)


1 talk publicly or carelessly about things which should be secret: This is a secret. Please don’t shoot your mouth off to everyone about it.
2 talk loudly and with too much pride about something: Mark is always shooting his mouth off about all the money he earns. OPPOSITE: watch your mouth/tongue
See also: mouth, off, shoot
Farlex Partner Idioms Dictionary
See also:
  • lip off
  • mouth off
  • run off at the mouth
  • shoot (one's) mouth off
  • shoot mouth off
  • shoot off (one's) mouth
  • shoot off at the mouth
  • shoot off mouth
  • shoot off one's mouth
  • shoot one’s mouth off
References in periodicals archive
The short film is being produced by Shoot Your Mouth Off, a production company in Hartlepool which specialises in making films with disabled people.
Ged's a hero
You want to try doing my job before you shoot your mouth off about it.
Fiona: Your Shout
Shoot Your Mouth Off (SYMO), based in Seaton Carew, works with people of all ages and with various disabilities, including cerebral palsy, Down's Syndrome and multiple sclerosis.
Movie with a message
Killer Cure, the latest film by Teesside-based disabled film-makers Shoot Your Mouth Off is hitting the screen at The Studio, Tower Street, Hartlepool, on Sunday at 7.30pm.
Killer Cure hits screen
The film is the latest offering from Shoot Your Mouth Off, which began life as part of Cleveland Arts' Articulate programme, which runs projects involving, inspired by and relating to disabled people.
"We're pleased to work with Shoot Your Mouth Off, its production crew and cast and hope the film does well when it goes on release."
Hospital welcome for Killer Cure!