a fly on the wheel

a fly on the wheel

Someone who thinks they are more powerful than they really are. Yeah, you aren't responsible for all of these charitable donations—stop acting like a fly on the wheel.
See also: fly, on, wheel
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

a fly on the wheel

a person who overestimates their own influence.
This phrase stems from Aesop's fable of a fly sitting on the axletree of a moving chariot and saying, ‘See what a dust I raise’.
See also: fly, on, wheel
Farlex Partner Idioms Dictionary © Farlex 2017
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