English Dictionary

poison-pen letter

noun

(idiomatic) A missive which is malicious, insulting, and/or defamatory toward a person, organization, or point of view, especially one which is unsigned.

She received a poison-pen letter in the mail.

意味（1）

(idiomatic) A missive which is malicious, insulting, and/or defamatory toward a person, organization, or point of view, especially one which is unsigned.

Miss Theresa Samuels . . . is accused by the Post Office authorities of sending scurrilous letters to young women whose engagements to marry had been publicly announced. . . . Those who received the poison pen letters were not willing to court the notoriety that would follow the prosecution of the case.