1to show a clean pair of heels
2to escape without trace (idiom); to make one's getaway (from the scene of a crime)
Examples
tā他kàn dào看到le了jǐng chá警察，jiù就táo zhī yāo yāo逃之夭夭le了。
他看到了警察，就逃之夭夭了。
As soon as he saw the policeman, he ran for it.
他一嗅到风声不对，就逃之夭夭了。
Sensing danger, he ran away.