under somebody's thumb

under (one's) thumb

Under another's authoritarian control; continually forced to submit to another's will. They seem happy when they're out and about, but I hear that Johnny is under his husband's thumb at home. Although the job paid well, I couldn't stand the way I was under the boss's thumb.
See also: thumb
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.

under somebody’s ˈthumb

(informal) completely controlled or influenced by another person: Now that they’re married, she’s completely under his thumb and never sees her old friends.
See also: thumb
Farlex Partner Idioms Dictionary © Farlex 2017
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References in classic literature ?
It's all being under somebody's thumb. What's on your mind, Jim?
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