pesterer

The persistent pesterer followed me down the street, trying to sell me a magazine subscription.

那个坚持不懈的纠缠者跟着我沿街走，试图向我推销杂志订阅。

My coworker is a pesterer who constantly asks me to do his tasks.

我的同事是个纠缠者，总是要求我替他做任务。

The online pesterer kept sending unwanted messages to my social media account.

那个网络纠缠者不停地向我的社交媒体账户发送骚扰信息。