1 definition by Skullman842

1. A abbreviation of “k thanks bye
2. A motherfucker who, in September 2019, hacked the oldest YouTube video and made it a living dump of like and sub beggars.
1. “Here are your clothes” “kthxbai
2. “Man that kthxbai hacker is a bitch”
by Skullman842 April 27, 2020
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