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An exceptionally conceited or arrogant person. He turned into a real swellhead after his books became so popular. I'm really tired of these self-important swellheads coming in here and telling us how to do our jobs.
Exceptionally conceited or arrogant. He's been getting really swellheaded ever since his books started selling well. I'm really tired of these self-swellheaded executives coming in here and telling us how to do our jobs.
See also: swellhead
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
n. a conceited person. Tom is getting to be such a swellhead.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.