(1):

(n.) A single roll of the wheel at roulette, or a deal at rouge et noir.

(2):

(n.) Among some tribes of North American Indians, the act of striking or touching an enemy in warfare with the hand or at close quarters, as with a short stick, in such a manner as by custom to entitle the doer to count the deed an act of bravery; hence, any of various other deeds recognized by custom as acts of bravery or honor.

(3):

(v. i.) To make a coup.

(4):

(n.) A sudden stroke; an unexpected device or stratagem; - a term used in various ways to convey the idea of promptness and force.