poison pen letter
noun/ˌpɔɪzn ˈpen letə(r)/
/ˌpɔɪzn ˈpen letər/
- an unpleasant letter that is not signed and is intended to upset the person who receives it
恶意的匿名信；匿名诽谤信 - He had been sending poison pen letters to people at work.
他一直在给工作的人们寄送匿名诽谤信。 - He had been sending poison pen letters to his neighbours, hoping to make them move away.
他一直给邻居寄恶意的匿名信，希望他们搬走。
- He had been sending poison pen letters to people at work.