1 definition by Gabe Hall

Top Definition
K Thanks goodbye

kthxbai can also be used as an insult to someone, like a n00b or someone you just don't like.
N00b1: omg liek u wana c my fab nu jurnal?
Dude: No, you make me sick n00b Kthxbai
by Gabe Hall June 25, 2005

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