on one's heels
01
closely following or pursuing someone or something, often in a persistent or bothersome manner
![on {one's} [heels] definition and meaning](https://cdn.langeek.co/photo/42800/original/?type=jpeg "on {one's} [heels] definition and meaning")
Idiom
Informal
例子
She always hovers on my heels, never giving me a moment of privacy or independence.
02
near the point of surpassing a fellow competitor
![on {one's} [heels] definition and meaning](https://cdn.langeek.co/photo/66324/original/?type=jpeg "on {one's} [heels] definition and meaning")
IdiomInformal例子
The leading candidate should be concerned about the underdog on his heels.
