MENDACITY:

1. Untruthfulness, the tendency or habit of lying, deceiving, misrepresenting the truth. 2. A lie or falsehood.

In arguing to repeal the new US heath-care bill, Representative Steven King of Iowa last week applauded the Speaker of the US House of Representatives, John Boehner, in these terms: "I would make the point that the leader and the speaker [of the House] have established their integrity and their mendacity for years in this Congress and I don't believe it can be effectively challenged."

Found on alphaDictionary.com.