knobhead

noun2

1. •
   (slang, vulgar) A fool; an idiot; a contemptible person.

   • Luca was wary of Tav getting away with too much twattishness, because he had a lot of it floating around, and maybe some people liked that whole knobhead dominant guy thing, but not Luca. — 2015
2. •
   (slang, vulgar) Synonym of glans penis.