when guys see trashy but attractive girls they would like to have intercourse with them, but dont have any intention of forming a relationship with her afterwards due to the fact she is known to get around or dresses like a hooker.
2:"dude your new girl is a total BNW"
May also be referred to black-n-white homosexual couple.
(Not to be confused with BMW car)
-Nice :) "
2: "-Dude did you ever tried BNW date?
-You should. Its fun!"
3: "-Yo man, Miami has so much BNW!
-Yeah, I kinda noticed that too."