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1.
literally: "Stroke of lightning" or "Strike of thunder".

From the french, pronounced: "koo de foodre".

(idiomatic) A sudden overwhelming feeling of love for somebody. Used in the context of love at first sight
- When I met Jess, it was the Coup de foudre!

- I had a Coup de foudre when I saw you
by stroke of lightning August 21, 2009