blackmouth

Meaning

Noun

• A chinook salmon (Oncorhynchus tshawytscha), especially a juvenile.
• a Presbyterian

Origin

• 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.