What is Jks?
1.
'
~me~: i killed my teacher 2day
~u~: dood thats totally jks
2.
Just kidding sucka. A play on the traditional slang term
Jesse: Dude, I think I just saw John Stamos.
Adam: Really?
Jesse: No...jks.
Adam: What does the "s" stand for?
Jesse: Sucka!
See