Blow the whistle - to report an illegal or unacceptable activity to the authorities.

向权威部门举报不合法、不能接受的行为。

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That spurs economic activity and softens the blow of the bad loans.

NPR: Lenders Consider Freezing Rates on Subprime Loans

After a hard day's work, many Sydney locals blow off steam at pub trivia, a popular group activity where the prizes can be substantial.

BBC: Trivia pays big in Sydney��s pubs

The Tax Reform Act of 1986 brought that to a crashing halt with the enactment of the passive activity loss rules (Section 469) which was a blow to real estate values.

FORBES: Wandering Tax Pro Will Not Be Loved in Real Estate Community