muscle in on (someone or something)(redirected from muscle in on something)
muscle in on (someone or something)
To use pressure or aggression to advance on someone or something in order to exert control or derive some benefit, usually when doing so is unwelcome. I'm not surprised that Jake undermined me to the boss—he's been trying to muscle in on my job.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.