(computing, GUI) A keyboard shortcut in Windows that completely closes the application or a focused window.
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(Internet slang, uncommon) An Internet meme involving novice users being tricked into closing applications.
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Viral internet speak — memes, ratios, main-character moments, and the algospeak of every platform from Twitter to Reddit to TikTok comment sections.
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(Internet slang, transitive, intransitive) To close or exit (a window or application) by pressing Alt-F4.
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