n. a public expression of one's feelings of importance or superiority. : The guy is on another ego trip. Pay no attention.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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Behavior or activities undertaken mainly out of vanity or for self-gratification. For example, She's really on an ego trip, trying out for the lead. [1960s]
