A female who's actions are derived from the following quality characteristics: slut, whore, jobless, moral-less, no class, gold-digger, irresponsible, lazy, druggie, ugly, fake, two-face, clubrat, inconsiderate, selfish, crazy... or just simply a pain in your butt.
Your Ex = Dirtbutt
My Ex = Dirtbutt
The girl of your dreams that doesn't want ANYTHING to do with you = Dirtbutt
A person, though seemingly employable, who appears to prioritize the twin freedoms of slouching and mooching above hygiene, housing, and pretty much everything else. Like a dirty hippie or a gutter punk, but with even less of an effort to retain ties to anything like a social movement. Noted for sitting in the dirt on their asses, often in shopping districts.
That dirt butt looked like he was gonna ask me for a quarter, but got distracted picking his nose.