a typically pleasant, likable person who avoids causing trouble or dissension (sometimes used with Miss, Ms., or Mrs. instead of Mr. when referring to a female).
n. a friendly, forgiving fellow. : Oh, my boss is Mr. Nice Guy. He'll let me off, I'm sure.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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