about face

(noun) a complete change of opinion or decision to the opposite

Example Sentences:

A: I heard you got accepted into Medical school. When do you start?
B: Actually, I changed my mind. I’m going to go to study Philosophy instead.
A: That is an about face.

While researching Saudi Arabia for her vacation, Vanessa had an about face and decided to go to Alaska instead.

From the Blogs:

Al Gore’s About Face

Media: