IdiomDaily LifeFrench

Tourner casaque

Meaning: To switch sides or change allegiance.

Literally: To turn one's tabard

Example: “À la veille du vote, trois députés ont tourné casaque.” — On the eve of the vote, three members of parliament switched sides.

English equivalent: To jump ship

Other ways to say this

Origin: The casaque was the surcoat bearing a lord's colors, so reversing it displayed different arms. The gesture was literal before it was figurative, and deserters really did turn their coats.

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