When you have a quantity of money that would've made you considered rich in the 1950's. It usually shows that you have money to do some things but not enough to do extravagant things.
1: "Dude, you're 50's rich. Let's go get pancakes at IHOP."
2: "I can't go to the concert, I'm only 50's rich. Those tickets cost $700."
2: "I can't go to the concert, I'm only 50's rich. Those tickets cost $700."
by HaileyandJacobBlack August 5, 2009