muscle in

muscle in

To forcefully encroach upon or interfere with (someone or something). In this town, any business that begins to see a profit will have the mafia muscling in before long. Jake must think I'm trying to muscle in, judging by the way he's been disparaging me to the boss lately.
See also: muscle
Farlex Dictionary of Idioms.

muscle in (on someone or something)

to try forcefully to displace someone or take over someone's property, interests, or relationships. Are you trying to muscle in on my scheme? If you try to muscle in, you'll be facing big trouble.
See also: muscle
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

muscle in

Also, muscle in on. Forcibly intrude on or interfere with something, as in The children were determined not to allow the school bully to muscle in, or No more muscling in on our policy decisions! [Colloquial; 1920s]
See also: muscle
The American Heritage® Dictionary of Idioms by Christine Ammer.
See also:
  • make inroads (in/into something)
  • make inroads in/into something
  • make inroads into
  • cut in on (something)
  • poach
  • poach on (one's) territory
  • poach on someone's territory
  • creep up
  • creep up on
  • creep up on (someone or something)