n. a clever and quiet person, especially in reference to romantic involvement; a seducer. : He thinks he's such a smooth operator! , Clare is an old smoothie till she thinks she's got everything the way she wants. Then you see the real Clare.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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[smoo-th
ee] 