来自wham,击，打，砰的声音，引申义晦气的。同时见短语double whammy,来自儿童漫画，“shoot a whammy”就是给某人下咒，double whammy就是下两个咒。
英文词源
whammy (n.)
often double whammy, "hex, evil eye," 1932, of unknown origin, popularized 1941 in Al Capp's comic strip "Li'l Abner," where it was the specialty of Evil-Eye Fleegle.
实用例句
1. We're suffering a triple whammy at the moment.
我们目前正遭受到了接二连三的打击。来自柯林斯例句
2. With this government we've had a double whammy of tax increases and benefit cuts.
自从这任政府上台以来，我们又是增税又是减少补贴，倒了双倍的霉。来自《权威词典》
3. Then, the scene of a double whammy - their car broke down again.
然后, 一个场景的双重打击 - 他们的车坏了.来自互联网
4. This double - whammy drives prices in a direction unfavourable to the customer.
