A homosexual Jock, usually the captian or head of a sports team. When they're not practicing or masterbating to pictures of Jake Gyllenhaal, they spend most of their time hitting on their teammates, Discussing the hottest NFL/NBA/MLB/NHL players, and sniffing the eachothers jock straps (thus the term "Jock-Strap Junkie").
Center: Hey, have you noticed that Jake squeezes when he gives you the "Good Game" slap?
Guard: Dude! I thought I was the only one that noticed!
Center: Do you think he's gay?
Guard: Yep. A strait up Jock-Strap Junkie.