CSB is an abbreviation for Chad Sucks Balls and can mean cool story bro.
Example:
Chad: Your gay
Person: CSB (meaning both Chad Sucks Balls, and Cool Story Bro).
by CSBFan112 August 15, 2011
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d00d, I'm so fucking gay. i think I'm a CSBS
by $n!pi August 14, 2003
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Cheater stopped by skill
Me is a skill0r who stops tschiedahs with 1337 skill ^^
by BuLLeT August 13, 2003
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cook some biscuits

an alternative for csb(cool story bro) basically meaning the same thing - go away you are boring
p1: i just finished my 10000 word essay on garden gnomes
p2: csb

or alternatively

p1: i just finished my 10000 word essay on garden gnomes
p2: cook some biscuits
by bjfkfb March 21, 2011
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Man 1: Dude watched the new American Pie last night!

Man 2: CSB NMT

Man 1: ¬_¬
by TurtleMan May 14, 2012
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