motorhead

noun2

1. •
   (US, slang) A car, truck, or motorcycle enthusiast.

   • The sportos, the motorheads, geeks, sluts, bloods, wastoids, dweebies, dickheads - they all adore him. They think he's a righteous dude. — 1986
2. •
   (UK, slang) A heavy user of amphetamines.