1 definition by I'm a ninja. For real, I am.

jky

Literally meaning "just kill yourself". Used in cases of extreme frustration of people you would really like to never see again.

Loser on AIM spamming you: LOL LOL LOL LOL LOL LOL LOL LOL
You: JKY you douche

by I'm a ninja. For real, I am. February 28, 2008