noun. Basically, a rank fart. Most dangerous exposure is experienced in confined spaces i.e. a car, plane, cubicle, etc. Also a term used to denote serious disgust with the gasser. slang; brownhouse, brownhouser.
1. Dude! Who let out the brownhouse??!
2. Man, you really need to keep that brownhouse effect to yourself!
The result of a person (or organisation) disappearing so far up their own backside that they warp a hole in spacetime from which not evenlogic can escape.
I came perilously close to the event horizon of a brownhole today and frankly, I'm lucky not to be buried in a whole heap of super-dense shit.