Scottish dialect meaning greasy, oily, or slippery.
From creesh plus the diminutive or descriptive suffix -ie, common in Scottish adjective formation. Creates an informal, familiar quality to the descriptor.
Scottish adds '-ie' to almost anything to make it more intimate and colloquial—'creeshie' isn't just greasy, it's *folksy* greasy, the kind of word a grandmother would use while wiping her hands on her apron.
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