1. The act of defecating on oneself before making it completely to the toilet. Dirived from the term "Thrown out" (as in baseball), this term refers to the fact that one could not reach the toilet fast enough before they started shitting themeselves. Hence, the term "Brown out".
1. Yo, dog, get outta' the way, I'm bout to brown out
When you are mad at your girlfriend and tell her that both of you are going for a trip in the country side. You walk by a farm and remove her top and push her in a pile of cow manure.
That scene where Biff got covered in manure in "Back to the Future". He wore a brown leather jacket.