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.
by P-Bizzle April 6, 2016
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It's a cruel name for an elderly person that just made you extremely angry
Old Guy(Bus Driver): You guys better stop yelling and moving seat to seat or I'm gonna stop this bus

Angered Teenager: Shut the fuck up you Dusty Ass Bitch!
by Jobob38 April 17, 2010
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a dumb ass bum ass dusty ass bitch who has dusty ass asscheeks
you must be talking about quin dusty ass
by t.i.a.n.a June 13, 2019
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When you had too much sex with a dog and now you got a crusty ass but it has dust in it
by smoojieho April 7, 2017
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