Slang a jinx or the evil eye: usually in put a (or the) whammy on
nounpl. wham·mies Slang
- A supernatural spell for subduing an adversary; a hex: put the whammy on someone.
- A serious or devastating setback: “The triple whammy: government cuts, declining corporate giving, and less favorable tax laws” (New York Times).
Origin of whammyPerhaps from wham.