Critical Knock-Out

When you get KO'd by an attack that you should've survived, had it not landed a critical hit.
CKO for short.

Game: Enemy attacks!
Player: No worries, I can survive this.
Game: Critical hit!
You've been defeated...
Player: Ugh! I hate Critical Knock-Outs!

by ChameleonDragon February 4, 2018