dirt arse Share definition Flag A notoriously easy girl who is willing to engage in intercourse with sketchy men, regarless of physical location. I can't believe Robyn banged that dude in the Arby's bathroom, man, she's a real dirt arse. dirt arse by Andy Cameron May 2, 2003 0 0 Get merch Get the dirt arse mug. Buy Now — $32.95 See more merch