coup de main

Borrowed from French coup de main.

coup de main

1. a sudden development or action to surprise an enemy
   • 1857, Anthony Trollope, Barchester Towers, Volume the Second, page 78 →ISBN

     That which of all things he most dreaded was that he should be out-generalled by Mr. Slope; and just at present it appeared probable that Mr. Slope would turn his flank, steal a march on him, cut off his provisions, carry his strong town by a coup de main, and at last beat him thoroughly in a regular pitched battle.

• IPA^(key): /ku d(ə) mɛ̃/

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coup de main m (plural coups de main)

1. a helping hand (assistance)

   Tu pourrais me donner un coup de main pour ranger la cuisine, s'il-te-plaît ? ― Could you give me a hand cleaning the kitchen please?

   Synonym: coup de pouce