Backing Away
  
What you do when talking with someone who has wicked halitosis.
In the financial world, backing away means making an offer and then changing your mind. It violates a bunch of rules and gives the market maker a bad name so others don't want to do business with them any more.
Example
A market maker offers to buy 100,000 shares of MSFT from you at $26.12... and then changes their mind.