As she walked down the street in her dress, some men made unpleasant catcalls at her.

catcalls 是复合名词，由 cat（猫）和 call（叫声）组成。原指像猫叫般尖锐的声音，现特指在公共场合对女性吹口哨或发出轻浮调戏的声音，带有骚扰性质。