Right before this, Game says "I'm rich like Porter." This is a reference to Rich Porter and Alpo who were drug kingpins in Harlem. Alpo killed Rich in a dispute over money. And whippin that water is a reference to cooking crack
my Rolls Royce Phantom (an extremely luxurious and expensive car) is as flashy as a mink coat worn by Frank Lucas, an international drug dealer who operated in New York City in the 1970s and made millions of dollars.
The Game compares himself to McDonald's, who serves millions of customers. To "flip an order" means to supply what is needed (for McDonald's it's hamburgers, for him drugs... probably crack), get the money, and move along to the next person.
The Game is saying he has (or is trying to get) as much money as Pablo Escobar, a drug lord from Colombia who was ruthless as he operated his drug empire (including cocaine which is often turned into crack cocaine) to gain money and power