Blackmouth

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A chinook salmon (Oncorhynchus tshawytscha), especially a juvenile.
  2. 2
    a Presbyterian Ireland, dated, derogatory

Etymology

From black + mouth. For the origin of the pejorative "Presbyterian", several theories exist: * A specialisation of a dialect sense "liar, slanderer, foul-mouthed person" applied to political radicals. * Ulster Scots refusing to take the "Black Oath" imposed in 1639; * Covenanters eating blackberries or blaeberries while hiding in the wilds during the The Killing Time.

Related phrases

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.