A contraction of 'Serious Business', popularly used among the Red vs Blue forums, as well as various other ports of call around the internet.

It's main use is mocking, when someone takes the internet too seriously or takes a joke too seriously, people will often remark on how it is "srs bsns".
Teh internets is srs bsns
by helmetlad June 05, 2006
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WWE Chris Jericho's darker, legend killing, serious form. He has infinite power and many cults among the wrestling forum's liars, hypocrites and parasites. Gets jobbed out to Cena and Mickey Rourke as well.
Ahh! SRS BSNS IS ABOUT TO PICK UP ON SMACKDOWN!
by irin April 24, 2009
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When One (or more) person(s) partakes in the ritual formerly known as "Gettin High", But in such a way as to not actually say said action.
Laine: Jack, You ready to the srs bsns in the car with me?
Jack: You know I'm always srs about the bsns broski.
by All about the Srs bsns August 29, 2009
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