Untranslatable word in any other language universal representative to the act to make a perfidy against something that is very important to the other.
Jimmy: " si, ma non te lo dico"
Bob: "Mamma mia, che cazzimma!
BoB: "do you know the name of that girl huh?"
Jimmy: "yep, but I don't want to tell you"
Bob: " Mamma mia, what a cazzimma!"