flap one's gums
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English[edit]
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Verb[edit]
flap one's gums (third-person singular simple present flaps one's gums, present participle flapping one's gums, simple past and past participle flapped one's gums)
- (idiomatic, colloquial, US) To speak idly; to talk without effect.
- Synonym: flap one's lips
- What's that old coot flapping his gums about this time?