McFoot in McMouth 

The ability of John McCain to continuously fuck-up what he is talking about - even on the basic things that he is running on.

An example would be when John McCain caught McFoot in McMouth disease and tried to redefine what a surge was because he could remember when it started and accidentally claimed that it started a year before it actually did.

McFoot in McMouth by Cindy McCain August 20, 2008