While "Junk Punk" may use scraps and "trash" the objects found on the clothing are completely reusable and in good shape. A style of recycling taken to an extreme.
Girl: I think you mean "scallawag," sir.
Dude: Fine, whatever, why are you wearing trash?
Girl: It's not trash, it's Junk Punk! *leadpipetokidney*
2. The above mentioned, but with an affinity for throwing vehicles together from spare (usually rusty) parts and a welding torch. Hence being covered in dust, dirt, and grease.
3. The above mentioned who specifically ride rat bikes.