(vulgar)Used to express astonishment, shock, incredulity, or disbelief (as a shortened form of expressions such as "What the fuck is going on?", "...are you doing?", "…did that?", "…did this?", "…just happened?, "…is wrong with this?", "…is wrong with that?", "…is happening?", "…are you saying?", "…did you say?", "…did I say?", "…were you?", "…are you talking about?", "…is wrong with you?", "…is with you?", "…is this?", "…is it?", "…was that?", "…was it?", "…was this?", "…are you?", "…do you want?", "…do you need?", "…do I have?", "…do I get?", "…happened?", "…did you do?", "…do I know?", "…do you know?" "…did I know?", "…did I do?", "…happened here?", "…happened there?", "…is wrong with it?", "…is this for?", "…is that for?", "…for?", "…was this for?", "…was that for?" or "...is that?").
(vulgar)Used to express nonchalance or the dismissal of any consequences of something one is about to do.
I finally said “eh, what the fuck” and quit my job.
1983, Risky Business, spoken by Miles (Curtis Armstrong):
Every now and then say, "What the fuck." "What the fuck" gives you freedom. Freedom brings opportunity. Opportunity makes your future.