stunner

noun

1. (colloquial)Anything that is stunning.
2. (colloquial)Anything that is stunning.

   “She's a runner, rebel and a stunner / On her merry way sayin', "Baby, what you gonna—?"”

3. A professional wrestling maneuver in which an attacking wrestler applies a facelock to an opponent and falls to a seated position, forcing the opponent's jaw or neck to drop on the attacker's shoulder.
4. A pistol firing a beam capable of stunning an enemy.

   “March holstered his pistol, reached into his coat, and drew out his own neural stunner, shifting the weapon to his right hand.”

5. A person or machine that stuns an animal before slaughter.