Canary in a coal mine

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The practice of using canaries in coal mines as an early warning system for toxic gases dates to the early 20th century. The phrase has become a common idiom for an early warning of danger.

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Appearance

Mentioned once in Kisses Sweeter Than Wine.

Kisses Sweeter Than Wine

Season 3 · Episode 5 · S03E05

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“Oh, well he's a regular canary in a coal mine, isn't he!”
— Frasier

Related References

From the same episode and category.

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Chambertin 1976

“Big, full-bodied, nicely baked. Essence of truffles, long finish - Chambertin 76'.”

Frasier · S03E05→

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“I'm hoping they name me the Maitre d'Chai. It's a long-standing dream of mine to wear that silver cup around my neck.”

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“the Brie is sweating up a storm.”

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