from Wiktionary, Creative Commons Attribution/Share-Alike License
- Used after interrogative pronouns as an intensifier to express anger, frustration, incredulity, or other strong emotion.
- Used after verbs forming a part of a phrasal verb as an intensifier to imply aggressive emphasis.
- Used as a shortened form of the common interrogative phrases.
- Used to emphatically express that something isn't true.
Sorry, no etymologies found.