A phrase used to express anger, surprise or ecstasy and to replace the word "what". (Note: this word may be considered rude by some people and should be avoided in both speech and writing. A kinder way to use this is "what the heck".
What the hell?! That guy just fricking lost his bat when he already had 2 outs! Is he mad?
expression of surprise. incregulous. shocked. Eqivalent to saying "what on earth" or "What Gives".
Considered a swear in some backward remote religious communities, like Texass.
man sees car crash: What the hell.
or
wife: 10% off ?! i'll get 2.
husband: what the hell.