coup de main

Etymology
Borrowed from.

Noun

 * 1) A sudden development or action to surprise an enemy.

Noun

 * 1) helping hand assistance
 * 2) dexterity, skill
 * 3) surprise attack, coup de main
 * 1) dexterity, skill
 * 2) surprise attack, coup de main
 * 1) surprise attack, coup de main