Do a 180 degree turn expression
To make a major or dramatic change in a particular aspect of one's life.
No one in my family is in favor of the idea of my doing a 180-degree turn on being a fighter.
You know what! Mary did a 180 degree turn. She decided to pursue a musical career despite protests from her parents.
The verb "do" must be conjugated according to its tense.
The origin of this phrase is not clear.
People tend to remember the bad things others do and while they easily forget or get rid of others' good things.