BBC - Electric Proms - 2009
The festival that creates new moments in music. Watch and listen to very special performances from Robbie Williams, Dizzee Rascal, Doves, Dame Shirley ...
shake your money maker = shake your arse
How do people make money from their arse?
In the world of entertainment, if you're an attractive woman with a curvaceous figure -- whether in movies, dancing at a strip club, prostituting, etc. -- you attract more admirers, and therefore, bring in more money. Thus, the implication is that one's posterior is what makes them money.
Or: moneymaker :
1. Street slang for the posterior , the ass . See ass for synonyms. '