what the hell
• why not?; what on earth?, what? (used to express surprise)
what the hell does she want?
• what in the world does he desire?
what the hell is going on
• what in the name of lucifer is going on here?, what the heck is happening here?
what the hell is this?
• what is this?, what's the meaning of this?, what's this all about? (cry of astonishment or anger)