Is it used a lot together in a form of "do a full one-eighty"?
The expression "do a one-eighty" is common to use whenever you are describing something turning around 180 degrees, or in other words, halfway so they are facing the opposite direction. It can also be used to mean that someone has made a big change in their life. You can say a "full one-eighty" or a "complete one-eighty" to add emphasis. Ex: When we hit the ice the car did a full one-eighty. Ex: He used to be a drug addict but he's done a full one-eighty and now he's been sober for months.