shoot off one's mouth
Speak indiscreetly; also, brag or boast. For example, Now don't go shooting off your mouth about it; it's supposed to be a surprise, or Terry is always shooting off his mouth about how many languages he speaks. [Slang; mid-1800s]
Words Nearby shoot off one's mouth
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
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