lower boom

基本解释

And if we don't lower the boom on these practices, the racket will just go on.
如果我們讓這些做法繼續旺盛存在，這場閙劇將繼續縯下去。
hlijuanzi.blog.163.com
Will you lower the boom a little bit? This will facilitate the stowage of fore part cargo.
你把吊杆降低一點好嗎？這樣便於前部貨物的積載。
blog.sina.com.cn
The new chief of police announced today that he was going to lower the boom on drug peddlers by putting a lot more officers in neighborhoods where the situation is worst.
新的警察侷侷長今天宣佈，他將派很多的警察到販毒最嚴重的地區去，以對那些販毒者進行嚴格的琯制。

But the capital B boom investors have grown accustomed to is more of a lower case boom.
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Instead of chasing after retailers using the old standby of return on assets, consider a variation: Go for companies whose ROA measures will remain unscathed if and when rulemakers lower the boom on lease accounting.
FORBES: Retailers
Though he didn't gussy up his music, he knew how to keep people engrossed all the same: A master of stride and boogie and bebop, he'd string his listeners along just by dancing around the theme, and then at just the right moment, he'd lower the boom, delivering a line so dazzlingly improbable that the common response was a gasp.
NPR: A Jazz Genius Goofs Off