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
Less intense than the experience of "blacking out" when drunk and not remembering portions (or all) of your night, "browning out" occurs when you don't remember something until someone brings it up. It's not a complete blackout, but partial, because you remember once someone refreshes you.
I didn't even remember making out with Bryanne until J-Lo told me (it must not have been that good)! I definitely had a brown out last night.