In general, you use the expression "No way!" to say "I don't want to do that" or " I don't want it to happen like that".

The expression "no way" is commonly used, especially by Americans, in an informal way. "There is no way I am going to do that" means "Under no circumstances am I going to do that". Or it can also be used as an exlclamation to show surprise: "No way!!" as a reaction to something unbelievable.

neanche per sogno!

to ho scritto sotto la risposta dall'altra utente

This has the same meaning as "no" except that "no" is heavily emphasized.