"What do you call the moisture between two white trash people having sex?"

"Relative Humidity."

Poor white trash; the great thing about making fun of them is that you can be as savagely mocking as you want because, hey, they're white, they're not part of some minority.

Unless you count people living in poverty as a minority, but that's a minor point I guess.

Poor white trash; they're ignorant, inbred, vicious, dirty and always high on speed or drunk.  This is the way they're portrayed, it's the received wisdom, so it must be true.

Except....isn't the received wisdom about other groups, blacks or Hispanics or gay people or overweight people or what have you, isn't that called prejudice? And isn't prejudice wrong? Maybe it's less wrong when it's about poor white trash, um, pardon me, I mean socio-economically disadvantaged Caucasians.

Poor white trash; they're the ones who led the charge across the frontier, right alongside the missionaries and the whiskey peddlers. Such folk didn't have anything to lose back East so were always ready to move West with Manifest Destiny, with their mongrel dogs and their towheaded brats, their ragged clothes and their rifles.  They had their uses in those days, were helpful when it came to wiping out or driving away the Native Americans, moving as they always did onto Indian land without bothering to check if it was legal to do so. Our government rarely if ever reined them in; they were America's shock troops, far more so than the 7th Cavalry.  

Of course, once the frontier was closed we had to set aside a place on the other side of the tracks where they could live without us having to look at them. Poverty isn't attractive, whatever color it comes in, so we shunted them off to the side; out of sight out of mind was the motto. Go to any blighted trailer park or urban white ghetto and you can still see them in their millions.

Poor white trash; feel free to make fun of them if you like. It's a riot, and no one gives a shit anyway.