Nasty letters

Longman Dictionary of Contemporary English Word definitions in Longman Dictionary of Contemporary English
noun EXAMPLES FROM CORPUS ▪ Anti-Semitic hate mail sent to an elementary school student in Benicia by classmates. ▪ From the early days Kylie was plagued by obscene phone calls and hate mail . ▪ He then accused her of sending him hate mail , photos of dismembered ...

Wikipedia Word definitions in Wikipedia
Hate mail (as electronic , posted , or otherwise) is a form of harassment , usually consisting of invective and potentially intimidating or threatening comments towards the recipient. Hate mail often contains exceptionally abusive, foul or otherwise hurtful ...

WordNet Word definitions in WordNet
n. mail that expresses the writer's dislike or hatred (usually in offensive language)

Wiktionary Word definitions in Wiktionary
alt. hostile correspondence sent to an individual or group. n. hostile correspondence sent to an individual or group.