in. to seem aggressive; to impress people initially as very aggressive and assertive. (See explanation at like gangbusters.) : She has a tendency to come on strong, but she's really a softie. , Bob comes on like gangbusters and gets meaner the more he drinks.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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