flap one's gums

verb

To speak (idly); to talk without effect.

“What's that old coot flapping his gums about this time?”

Meanings

verbflap 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)

present singular third person flaps one's gums · participle present flapping one's gums · participle past flapped one's gums · past flapped one's gums

  1. UScolloquialidiomaticTo speak (idly); to talk without effect.

    What's that old coot flapping his gums about this time?

    1 more example

    It’s a relief in director Johannes Roberts’ horror movie that there are no actual chimps flapping their gums while voiceover actors dub corny dialogue.

    2026 January 9, David Rooney, “‘Primate’ Review: College Kids Fight to Survive a Rabid Pet Chimp in a Slasher Movie That’s as Enjoyably Nerve-Shredding as It Is Silly”, in The New York Times, New York, N.Y.: The New York Times Company, →ISSN, →OCLC, archived from the original on 11 Jan 2026

    Synonyms: flap one's jaws, flap one's lips

Synonyms & antonyms

verbTo speak (idly); to talk without effect.

Cite this entry
APA

flap one's gums. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/flap%20one's%20gums

MLA

“flap one's gums.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/flap%20one's%20gums. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “flap one's gums,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/flap%20one's%20gums.

Source: flap one's gums on Wiktionary, CC BY-SA 4.0.