Whammy
来自Big Physics
1940s: from the noun wham + -y1; associated from the 1950s with the cartoon strip Li'l Abner, in which the hillbilly Evil-Eye Fleegle could ‘shoot a whammy’ (to put a curse on somebody) by pointing a finger with one eye open, and a ‘double whammy’ with both eyes open.
wiktionary
From wham + -y.
etymonline
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.