wham·my 
/ˈwæmi/ noun
plural wham·mies /ˈwæmi/ noun [count] informal : something (such as a magical spell) that causes someone to have bad luck
▪ Talking about his winning streak must have put the whammy on him [=caused him to have bad luck], because he lost the next day. — see also double whammy
▪ Talking about his winning streak must have put the whammy on him [=caused him to have bad luck], because he lost the next day. — see also double whammy
