be (as) rich as Rockefeller
To be extremely wealthy. John D. Rockefeller, a 19th-century oil magnate, is one of the richest people to ever live. Of course Jane has a fancy car—her family's as rich as Rockefeller. You can only live in this part of town if you're rich as Rockefeller, unfortunately. I hear her father is rich as Rockefeller, so I wouldn't be too worried about her future.
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