diatribe

noun di·a·tribe \ˈdī-ə-ˌtrīb\

: an angry and usually long speech or piece of writing that strongly criticizes someone or something

Full Definition of DIATRIBE

archaic : a prolonged discourse

: a bitter and abusive speech or piece of writing

: ironic or satirical criticism

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Examples of DIATRIBE

… his apparent inability to keep his pen from drifting from the main objective of his words into diatribe must have taken away from the sound and otherwise convincing arguments that he advanced. —Henry Petroski, Engineers of Dreams, 1995
I looked … and listened to her ahistorical and apolitical diatribe. Her comments were a more extreme form of the kind of Black bashing I've often heard … —Itabari Njeri, “Sushi and Grits,” in Lure and Loathing, 1993
… gradually I realize the headman's diatribe has begun to feature a new term I was unfamiliar with at the time—the word for caterpillar, as it turns out, in the Iban dialect. —T. Coraghessan Boyle, Harper's, April 1993
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Origin of DIATRIBE

Latin diatriba, from Greek diatribē pastime, discourse, from diatribein to spend (time), wear away, from dia- + tribein to rub — more at throw

First Known Use: 1581