Dookie brown leather jacket
It’s the color of shit, brown, obviously.
Might also refer to Duckie Brown, a high fashion brand that sells outerwear. Duckie Brown is supposed to be a signature leather brown jacket, common back in the day. Of course, since “Duckie” sounds like “dookie”, it could be a joke about that brand
To help improve the meaning of these lyrics, visit "Thrift Shop" by Macklemore and Ryan Lewis (Ft. Macklemore & Wanz) Lyrics and leave a comment on the lyrics box