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".
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.
Someone who is addicted to obtaining money and building wealth. A money addict and fanatic. Breadheads often work more than one full-time job, and some even participate in illicit activities to "obtain the bread".