A term similar to 'whitetrash', except, of course, that it applies to people from the Indian Sub-continent (Indians, Pakistanis, Bangladeshis and Sri Lankans). While not necessarily hick-ish in the NASCAR watching way, Browntrash are known for their book-smarts, lack of social skills and a tendency to travel in packs and stare compulsively at everyone else. They also gossip incessantly and seem to derive sustenance from rumour-mongering. While they might appear to be hostile, they're actually quite simple-minded.
A="There shall be hell to pay if the Browntrash see me with my girl-friend!"
B= "Yeah, your mother in New Delhi will probably find out all about your 'debauchery' within the hour!