a figment of somebody's imagination

figment of (one's)/the imagination

An experience that initially is thought to be real but is actually imagined. I thought I heard the sound of my front door opening last night but it turned out to be a figment of my imagination.
See also: figment, imagination, of
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

a figment of somebody’s imagiˈnation

something which somebody only imagines: Doctor, are you suggesting the pain is a figment of my imagination?
See also: figment, imagination, of
Farlex Partner Idioms Dictionary © Farlex 2017
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References in periodicals archive ?
It is a figment of somebody's imagination,'' Pakistan's Foreign Ministry spokesman Masood Ahmad Khan told Kyodo News.