armchair general

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armchair general

One who speaks authoritatively on topics one actually knows little to nothing about. My uncle is such an armchair general about the classes I'm taking—the fact that he never went to college doesn't stop him from weighing in! Stop being an armchair general and let me fix my car, since I actually know what I'm doing here!
See also: armchair, general
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

armchair general

A self-proclaimed military expert with little or no practical experience, who imposes his or her views on others. See also backseat driver; Monday-morning quarterback.
See also: armchair, general
The Dictionary of Clichés by Christine Ammer Copyright © 2013 by Christine Ammer
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