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1.
1) A phrase used to end a conversation with someone and thank them for talking to you.

2) A phrase used to change a conversation with someone or two show that you do not like what they are doing/talking about.

**A common misspelling is kthxbye** (owned!)
1)
Person 1: Okay...Cya around!
Person 2: KKTHXBYE

2)
Person 1: What's the first thing that comes to mind when you think of two lesbians in a Thai fish market...?
Person 2: KKTHXBYE
Person 1: lolzies! J/k!
by Maxx Paigne December 27, 2003
42 18