Paid Heavy
A group of tough guys or armed goons hired to mess you up if you don't do what they say.
My neighbor got paid heavy because he didn't pay his rent. Now he's got a black eye and a broken nose.
The guy who skipped out on his bill got paid heavy by some guys who looked like they were ready to fight.
I got paid heavy by some guys who came to my house and told me to pay up or else.
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