knobhead spec

The unofficial term for items customized or made to a bespoke specification for knobheads.

Typically refers to a white guy ordering something that is stereotypical of black gang culture, such as a range rover with blacked out windows and oversize wheels or a flat peak baseball cap.

Friend 1: Did you see his new Range Rover?
Friend 2: Yea. I see he's gone for knobhead spec.