She got angry when a group of boys started catcalling her as she walked down the street.

### 解释 catcalling 是动词 catcall 的现在分词形式。catcall 由名词 cat（猫）和 call（叫声）组成，原指剧场里观众发出的嘘声或嘲笑声，后来引申为"在公共场合对女性吹口哨、喊叫或说下流话"的骚扰行为。