Wiktionary
vb. 1 (context idiomatic English) To use one's superior physical strength. 2 (context idiomatic with "on" English) To suddenly overpower.
Usage examples of "lower the boom".
They find an excuse to lower the boom on us, one day when we least expect it.
What do you think, Rudy, should we quit crapping around and just go in there and lower the boom on Joe Mondragon and screw the consequences?
Winlock and her son on the stand and let them swear to the story they've offered to tell, I get Dianne off the hook but leave myself open to a charge of suborning perjury at any time Winlock wants to lower the boom on me.
If things had gone wrong she'd have had MacDonald turn Queen's evidence and lower the boom on Gregori by betraying his plans.
This time for sure, he thought, this time they lower the boom on you.
Damn with faint praise to soften the blow, and then lower the boom.
And it was too late to cover the thirty or so feet to the barrier's tiny control shack, switch on and lower the boom.