horse's mouth

noun

An authentic source; someone who directly experienced or witnessed something.

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Meanings

nounhorse's mouth (plural horses' mouths)

plural horses' mouths

  1. idiomaticAn authentic source; someone who directly experienced or witnessed something.

    I thought it would be quicker to hear it from the horse's mouth.

    2022, Liam McIlvanney, The Heretic, page 374
Cite this entry
APA

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

MLA

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

Chicago

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

Source: horse's mouth on Wiktionary, CC BY-SA 4.0.