The term 'put the whammy on' is an expression that means to cast a spell or JINX on someone. It is often used in a humorous way to describe a situation where something bad has happened to someone. The crossword solutions for this term are JINX (4 letters), HEX (3 letters), and HEXED (5 letters). A JINX is a type of curse or bad luck, while a HEX is a magical spell or charm used to bring bad luck or misfortune. HEXED is the past tense of HEX, meaning to have been cursed or affected by a HEX.