bring down the hammer (on one)(redirected from it brings down the hammer on somebody)
bring down the hammer (on one)
To very strongly rebuke, criticize, condemn, or punish one. The principal brought down the hammer on Mark because of that prank he pulled in class yesterday. I can't sneak out—I'm already grounded, and my parents have sworn they'll bring down the hammer if I break the rules again.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.