a type of somersault (= movement in which you turn over completely) which involves turning backwards and landing on your feet

to do a backflip 做一个后空翻

to do a backflip

Acrobats backflipped across the stage. 杂技演员翻着后空翻越过舞台。

to completely change your opinion or decision about something

The governor backflipped on the tax. 州长在税务问题上来了个180度大转弯。