"The Hustle" is when the customer, after a price has been agreed upon and the work completed, starts coming up with reasons why the bill should be lower. Another guy charges less, I have to vacuum, I'm on a fixed income, it only took one hour (not two), etc.
Possibly the worst sort of 'hustle' is the 'can I pay part now and the rest later?' Or- my favorite variation- "I'm not authorised to pay, the person who is isn't here now, but I can pay if you reduce your price."
Dealing with "the Hustle" is another topic altogether, one I suggest you discuss in the Wednesday chat room, if you can.
The short version is....be as clear as possible before work starts, be prepared to be ruthless (legally, of course), and refuse any attempt to re-negotiate the deal after the work is done.
