Putting an end to an SMSconversation especially if your interlocutor is a last texter. Usually it is very hard to respond to such an answer.
Sarah: nat is such a bitch! do u know what she did last night?? i hate her so much!!
Jimmy: haha ok
Sarah: You always try to abort our conversations prematurely... Stop haha-oking me!
Jimmy: haha ok
Urban slang from Amsterdam also used in Australia to say ok in a more friedly way. Used to say ok to child as Willy Wonka in the movie Charlie and the Chocolate Factory.