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3. do a one-eighty

do a one-eighty

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do a one-eighty

 and turn one hundred and eighty degrees 

1. Lit. to turn around and go in the opposite direction. When I hollered, the dog did a one-eighty and headed back to its own yard.

2. Fig. to radically reverse a decision or opinion. His political philosophy turned one hundred and eighty degrees when he grew a little older.