archaic idiomatic term meaning "dollar bill", derived from the earlier idiom "greenback", so called because of the color of the reverse side of US currency.
"Dude wanted mucho frogskins, Man; I just didn't have the Dust."
A person you hate intensely not because they deserve such hatred but because they serve as a focus for your general hatred. A healthy way to dispense with excess animosity.
Jake's not really that big an asshole. He just serves as my hate sink.