โKysโ is a death threat, short for: โKill yourself.โ.
Some people say that it is short for โKeep yourself safe.โ But mostly itโs short for โKill yourself.โ
No-name#1: โWhat does โKYSโ stand for?
No-name#2: โIt stands for โKeep yourself safeโ!
No-name #3: โIt stands for โKill yourself.โ