180
noun [ C usually singular ] US informal uk/ˌwʌnˈeɪ.ti/ us/ˌwʌnˈeɪ.t̬i/
180 度大转变
a sudden change from a particular opinion, decision, or plan to an opposite one
do a 180 Jack's done a 180 and agreed to come on the trip. 杰克来了个180度的大转变，同意一起去。
make a 180 We made a 180 and decided to go after all.