The word "Scumbag" originated from a slang word for "used condom". So that works pretty well. "Pillow Biter" too, I guess.
A chump. The word is beautiful. It can be used as a term of endearment, as in, "Hey, chump! How ya doin'?" ... when talking to your dog, or in any number of ways when insulting someone, all being required is a change in the inflection. "You just had to be a chump, didn't you!" "You ****in' chump!" What a chump! Oh god, you're a chump. Just shoot yourself!" And so on.
Spaz Special Ed Harlot Slattern Women of Low Morals Tart Dunce Dolt Dullard Dimbulb Oaf Lout Clod Philistine And for all of the UT fans Aggie