Rednecks with Disposable Income. Typically a person hailing from a rural or exurban area with a modicum of formal education who strikes it comparatively rich in one of the classic redneck occupations: plumbing supply, tow trucking, sale of family-owned land to developer, marijuana cultivation. An RDI spends freely on redneck status symbols, such as a tricked-out bass boat, Harley-Davidson, ostentatious McMansion, gold chains, Tony Stewart tattoos, gleaming RV for treks to Talladega. Personification of the adage "money cannot buy class." Object of both envy and scorn from less moneyed rednecks.
"Ole Jim Bob Parker made a ton of money laying pipe and now all of them Parkers are just RDIs. They think they're something but they ain't nothin'. Still rednecks. Like that new bass boat o' his though."