From Longman Dictionary of Contemporary Englishwhat/how/why/where etc the hell?what/how/why/where etc the hell?spoken not politeSURPRISEDANGRY used to show that you are very surprised or angryHow the hell are we going to do that? → hell
Examples from the Corpus
what/how/why/where etc the hell?• What the hell does the reaction matter if you want to do it?• What the hell was he talking about?• What the hell was she playing at?• Where the hell have you been?• Why the hell couldn't you have told us?• Wondering what the hell he's up to.• She admits there are no jobs and wonders what the hell she is doing. 