Short for Kimetsu no Yaiba , which is also known as Demon Slayer.
A really coolanime/manga which made me cry many times, with too many spoilers on social medias.
Person A: “yo KnY is so damncool, you should watch it”
Person B: “I’ve read the entire manga series and watched the whole goddamn anime. We aren’t on the same level.”
KnY, Kny, KNY, and kny are all abbreviations for Kimetsu No Yaiba, the Japanese name of an anime with the english name Demon Slayer.
Person 1: "Have you seen kny?"
Person 2: "Yea, it was great. Although not my favorite anime this year."
Person 1: "Understandable, but it is mine."
Person 2: "Makes sense, it's a fun anime."