a fly will not get into a closed mouth

a fly will not get into a closed mouth

proverb If you say nothing at all, then you can't say anything embarrassing or inappropriate. A: "Oh my god, I can't believe I said that. Why are you being so quiet?" B: "Because a fly will not get into a closed mouth!" Knowing that I would inevitably say something ridiculous, I kept my mouth shut—a fly will not get into a closed mouth, after all.
See also: closed, fly, get, mouth, not, will
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
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