Dialectal British adjective meaning quarrelsome, irritable, or prone to grumbling and complaining.
From 'fratch' with the -y or -ety suffix, creating an adjective form that emphasizes the characteristic quality of being argumentative.
Fratchety is gorgeously onomatopoetic when you say it aloud—the 'tch' sound almost sounds like complaining, and British dialects are full of words where the sound matches the meaning!
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