n. A dusty ass nigga is any person who dresses poorly, is unattractive, has bad hair, and is generally unattractive, unkempt, and unappealing. synonymous with ratchet.
When you fail at something in life (eg. failing an exam or not getting a job), go home and spend an hour just standing in the shower, propping yourself up against the wall with your eyes on your feet.
Caleb knew the only thing to do after he didnt get prefect was take a failure shower.