See my bio on FB -- I'm currently acting and writing, I taught for 36 years at Massasoit Community College. I travel a great deal, love theater, film. I read stacks of books and tons of material. etc etc.
It's a piece of slang that just sounds bad. It means really really really big. It's in-talk! It's pretentious and I think it has a difficult gay connotation, that's disparaging and maybe self-disparaging!!