Putting a "K" at the end of someone's name is a way to call him on the internet when you having beef with him.
JohnDoeK
It is just a short form of "OK".
Kyle: Wanna hang out with the boys bro?John: K
It's just a short form of "Ok".
Kyle: Wanna go to the the arcade this Sunday?
Jay: K.
The worst word you or anyone can say
You break hearts when you use this cursed word
Me:i like you
Crush: K
It means "ok" but in a cool and short way
Friend:Come to my home for lunch
Me:K