(informal) A more extreme form of the mullet hairstyle, in which the hair at the back is kept long, whilst the hair on the top and the sides is shaven in a buzzcut or skinhead style.
2010, Chad Gibbs, God & Football: Faith and Fanaticism in the Southeastern Conference, page № unknown:John was, thankfully, no longer sporting the skullet from his Facebook profile. “So what was the deal with that?†I asked. John just laughed. “It was a contest Christian Student Fellowship put on last year to see who could grow the best mullet. I won.†“I’m sure.†“And then when we left for our mission trip to Africa, I had to take it up a notch, so I went for the skullet.†How beautiful is the skullet of him who brings good news.----
