A slang term we use in Louisville for girls who usually sales their body for dope, or let's guys run trains on them, usually a white girl that's a junkie from Portland neighborhood who walks the nasty streets bare footed, usually will have a few STDs, also usually have teeth missing .
I heard you fuckin wit Brittany from 26th & Xavier, et bitch is a luh Dirty Butt , bro tf you got goin on?
When a bi male takes a load from a man then has relations with a woman and she gets pregnant.
Did you hear Jess had Scott's dirty butt baby? Brad was the sperm donor.
Usually a female, Who has been around the block a few times, and their butts are dirty
Ewww your going to smash that dirty butt girl.