The act of being a douchebag while simultaneously being very grimy with your money. Thus, being really cheap, yet still maintaining an attitude that you're better than anyone else.
Ok folks, its shYster. (and not slang)
1. a lawyer who uses unprofessional or questionable methods.
2. a person who gets along by petty, sharp practices.
Calling someone a shyster (not Sheister) might be considered libellous; knowing its probable origin adds insult to injury.