Scottish or dialectal adjective meaning prone to raiding or plundering; characterized by theft or robbery.
From 'creach' (Scottish/Irish verb meaning to raid or steal) plus the adjectival suffix '-y,' which converts verbs and nouns into adjectives describing a quality or tendency.
Scottish and Irish English preserved many Gaelic words that have no direct equivalents in standard English—'creachy' is a perfect example of how losing a language means losing entire concepts and the colorful words that name human behavior.
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