Oh yeah, there are lots of white trash beers.
I'll separate some out into three categories - Yuppie, Blue Collar, White Trash.
Yuppie
Any Sam Adams
Sam Smith's
Sierra Nevada
Corona (but just barely)
Heinekin (sp?)
Guinness (sp?)
Anchorsteam
McKewan's Scotch Ale - or any scotch ale for that matter
Any Pale Ale
Any IPA
Killian's Red
Any beer from a country other than the US
Blue Collar
Budweiser
Bud Light
Any Miller or Miller Light
Old Milwaukee
Busch
Iron City (although a good case could be made for White Trash on this one)
White Trash
Chicago Old Style
Red White and Blue
Gennesee
Mickey's Big Mouth
Little Kings
Pabst