Resembling or made of cork; or (slang, informal) slightly crazy, eccentric, or lively in a quirky way.
From 'cork' (the bark of the cork oak tree), with the suffix '-y' making it an adjective; the 'eccentric' meaning originated in Australian slang around the 1970s-80s.
Australian slang transformed 'corky' from meaning 'cork-like' to meaning 'eccentric'—showing how the same word can completely change meaning by jumping between English-speaking countries!
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