What is Game-ender?
1.
A hateful remark or jeer, that is so heinous it causes the target to stop any of their hateful comments. Used as a tactical strategy to keep others from hatin' back on to you. Only the most diabolical schemers will deploy this tactic.
Best used as something extremely embarrassing or something that your target does not want others knowing
Jim: Yo, i got a game-ender on you man, so you better shut up
Mark: Alright, I'll be quiet
See
