It's a New York expression. When you are OK, when you do not need any further explanation, or when someone tries to make you shut up, they say "You Good Money". meaning everything is OK.
Guy 1: Yo.. I didnt tell her that yo...
Guy 2: Aight, You Good Money, B.
You okay, your alright,doing fine, you straight, in the clear
Someone says "you good money", is saying that all is allright, or that you will be straight.
Another way to say you feel like you spent a lot of money.
"Now people can buy or get the abandoned map and the shotty for free or little money on PS Store! I did not even get an early with mine! I spent good money for it too!"
(referencing the early that is currently not happening due to PSN downtime and then when PSN came back up and everyone got a chance to input the codes they find they cannot use it due to server maintenance while PS Plus get it for free and everyone else might be able to buy it)
see luke and leigh's pending homecoming plans
Luke's night is gonna be good money.