A gay loner. Someone who is a loner in a gay fashion.
"Kara is such a gloner"
Gloner is short for "Glee Boner". Generally, someone may obtain a Gloner while watching an episode of Glee.
Guy 1: Oh my god Steve!! Did you see that episode of Glee last night?!?
Guy 2: You better believe it Perry, I had the biggest Gloner way after the show was over too!!