Derogatory term for a homosexual male, a cross between the terms 'bender' and 'bummer.' Made popular by E4 comedy 'The Inbetweeners.'
1. (Original Context)
Neil's dad: Neil! What the hell is going on?! Oh! This place smells like a brewery, and not a nice one. Jay, there's always trouble when you're around, but Will I'm especially surprised at you. I'm so sorry, Steve.
Will: Oh, PISS OFF!
Neil's dad: What? Don't talk to me like that in my own house!
Will: Oh, I'm so sorry. My manners. Piss off PLEASE!
Neil's dad: I've had enough of your lip.
Will: Oh you'd like my lip wouldn't you... right round your bell end, if Mr Chippy doesn't get there first! What's he gonna knock up? A closet for you to hide in? You BUMDER!
2. (Everyday use)
"Oi mate, what's with the earring/pink shirt/George Michael CD/(whatever)? You a bumder or something?"