A game mode on Roblox primarily known for the high-difficulty nature of the game. The players of this game usually be someone who is a hardcore fans of Roblox games in general and most likely a retard.
for example: Me, DecayingFuengs, is a retard. All of my friends are also retards as well.
the sentence in which the word Decaying Winter is used often goes as stated below
DecayingFuengs: You hop on Decaying Winter tonight?
Other people: No fuck you and your retarded brain. I won't play yo shitty ass game, maybe go play some call of duty or valorant or some shit. Scram!