The command of mystery. It can do anything to your computer.
Red
How do I sabotage the O2?

Blue

Alt+F4.
Red
Thanks, I will do it.
by thealtf4psychic October 17, 2020
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1. to completly beat someone or something in a debate or game
I will ALT+F4 you in a debate

Wow, you got ALT+f4-ed in halo
by Nikku March 31, 2006
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When an other person presses alt + f4 on your computer to close the program you are running. Usually when you're playing a computer game.
Person 1: You idiot i was winning
Person 2: What happened?
Person 1: He Alt F4'd me
by pickerjo2000 November 3, 2006
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A command you give a collegue when you want them to close the inappropriate instant message window you just send them
A - "hi mark, xxxx is such a complete loser - hate him"
B - "lol yeah agreed"
A "ALT F4 PLS - just in case!"
by Luke L May 24, 2011
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1. A techie alternative to swearing when in polite company

2. A tech reviews site launched from Lancashire, England
1. "Oh, sod it! Alt F4!"

2. "Have you checked "Sod It! Alt F4!"?" "No..." "OMG LOLZ YOU UBER-N00B!"
by Trixxie223 May 13, 2011
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Once uttered by The True Master, and memed about since the original occurance. Jokingly, an individual pretended to start to press the computer command ‘Alt + F4’ on the laptop The True Master was using, leading to Him uttering this amazing phase.

‘Alt + F4’ as a computer command relates to the computer button ‘Alt’ being pressed, and then subsequently ‘F4’ after. This causes the current open window to close, and may close without progress or work being saved. The True Master did not want His window to close, so He had to utter this phase in a successful attempt to halt the action.
Person 1: *pretends to pressAlt + F4’*
The True Master: “Curse you and your Alt + F4!”
by .Mega February 24, 2020
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When somebody joins a lobby of kids and the children are told to press alt and 54 they will exit the tab
causing them to leave.
"Press alt and f4 for free in game currency."
by JKbAlls June 24, 2021
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