Definition
Very rich (wealthy).
Origins
From filthy lucre.
Opposite In Meaning
- dirt-poor
How People Actually Use It
to have an abundance of money and wealth being more than just rich
""Your grandfather has a gigantic mansion, a mercedes-benz, and a pool. He sure is rich" "Watch you talking about, wangsta. My grandfather ain't rich, he's FILTHY RICH."
Source: Urban Dictionary