A bro in which you commit SIATBO with. Because bros stick together and it's cooler to die with a bro than by yourself.
Example 1:
Guy 1: "Dude, I'm just tired of everything, I'm totally gonna SIATBO next week."
Guy 2: "Oh man, I was totally planning to do that too. SIATBRO's?
Guy 1: "Totally SIATBRO's."
by Soul Koala November 8, 2010
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