I am sure Zen can explain it better but its some sort of investment scheme.
I tried it out and failed but this may give you a better idea.
1. You plan out a simple Investment Brokerage Ponzi Scheme that pays investors 10% interest per month.
2. You get a few investors to pony up $1000 to earn a 10% interest in a moth.
3. Those investors spread the word, and your scheme starts to gather steam.
Result: After a few more suckers are trapped in your scheme, the bottom falls out. All your investors catch wind of what is really going on and cancel their payments to you.
You can also read the Wikipedia Explanation below.
http://en.wikipedia.org/wiki/Ponzi_scheme
Hope this helps