As nouns the difference between whammy and shammy
is that whammy is a serious or devastating setback while shammy is chamois leather.
whammy
English
Noun
(whammies)
a serious or devastating setback
an evil spell; a curse or hex
Derived terms
* double whammy
* triple whammy
shammy
English
Noun
(shammies)
chamois leather
a cloth made of this leather