We've also got 'geezer', the equivalent to the American's 'dude'.
Nah, mate is the equivalent to dude.
I only know one guy who says geezer, ever, and he's from Birmingham. Before I met him I literally had never heard that.
"Mate" is pretty much interchangeable with dude, except it can also be used by older people and a few other differences.
Also, the chavs way in strong with their 'bleds' and 'bruvs'.
Yea, they but they're subhuman so don't count.