The Thresh Prince of Bel-Air is a troll TV series starring Troll Will Smith. It's about a green-blooded threshecutioner cadet who sasses up the bluebloods in his flaysquad pretty good. Their blood is literally blue. Lousy snobs. But Troll Will Smith shows them all how to loosen up.
A DVD of the show was most likely used to create Karkat's Homes Smell Ya Later sickle.