it actually means "ok ok" pero people use it with the meaning "alright"

it is most used in online games.

I don't wanna talk to you and I hate you

Online: 1. A term of acknowledgement; esp. without particular interest.

The best ever insult/comeback in all of history.

the ultimate response to someone you don't like or when you don't care what the person is saying.

The most annoying and infuriating way of saying "okay" or "alright". Usually accompanied by a period (k.) and often the only thing said for one person's part of a conversation. Often used by people in text conversations who are too damn lazy to type out the entire word. It's very indirect and nondescript, you can't tell how someone feels about something if they just say "k."

Don't do it. It's annoying.