shoot your mouth off (about something)
idiomPart ofshoot
shoot your mouth off (about something) — idiom
1. To talk too much or too proudly about something, often revealing secrets.
1.idiom
Definition
To talk too much or too proudly about something, often revealing secrets.
Example
He shot his mouth off about his promotion, annoying his coworkers.
Stop shooting your mouth off about your plans; someone might steal them.