the fuck

phrase

(vulgar, slang) Used after interrogative pronouns as an intensifier to express anger, frustration, incredulity, or other strong emotion.

What the fuck is going on here?

意味（1）

(vulgar, slang) Used after interrogative pronouns as an intensifier to express anger, frustration, incredulity, or other strong emotion.

"Look at this!" she says, mock-appalled at the scene. "Seriously, what the fuck is this about?"

意味（2）

(vulgar, slang) Used after verbs forming a part of a phrasal verb as an intensifier to imply aggressive emphasis.

Shut the fuck up.

意味（3）

(vulgar, slang, by ellipsis) Used as a shortened form of the common interrogative phrases.

The fuck was that? ― What the fuck was that?

意味（4）

(vulgar, slang) Used to emphatically express that something isn't true.

‘You're not a self-respecting person.’

‘The fuck I ain't,’ the kid said.