Top Definition
When you really really have to take a shit so you're rushing to get home so you put the brown siren on top of your car to let everyone know to get out of your way.
Robert: Shit! Why did we have to go to the Indian restaurant on the other side of town. I don't think I'm gonna make it home. Put on the brown siren for fucks sake!
by m.c. phatback August 12, 2010
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