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13.
The word was used originally in starcraft. Although not many know this word, it is there. If one says alt+f4 to another it means get the fuck out. alt+f4 is pressed to instantly exit a program and so it came to be that if one says alt+f4 to someone else, it means they should leave. People will trick n00bs into pressing alt+f4 if they seem to bother one.
1. Ok i think you should alt+f4.
2. Press alt+f4 its a cheat.
3. JUST alt+f4 YOUR ASS OUT OF HERE.
by RoarMan March 20, 2006
 
1.
1. These keys will exit a program instead of using the exit icons.
2. A fun way to get rid of noobs in multiplayer games and chat rooms.
Halo guy 1: "Hey how do you change grenades?"
Halo guy 2: "ALt+F4."
Halo guy 1: diconnected
Halo guy 2: "HAHA stupid noob!"
Halo guy 1: re-enter: "Hey that's not funny dickhead!"
Halo guy 2: "STFU stupid Noob!"
by Punkhead May 25, 2005
 
2.
shortcut key for nearly all Windows Operating Systems to Close the active window or application.
Also used as an insulting tool by the 1337 or l33t people to have a bad/angry gamers, aka noob, to trick them to quit the game.
friend: dude, how do I quit this?
me: hold 'Alt' and press the 'F4' key at the top of the keyboard.

also
l33t: to fix the lag, hold Alt and press F4
<random noobs log out>
l33t: sweet, less lag...works all the time.
by Edward Evil, CEO of Evil INC November 16, 2004
 
3.
The best way to save any important document
Just try it. Alt + F4
by kohlmanfrack April 20, 2010
 
4.
Keyboard command to exit out whatever it is you are in.
Press Alt + F4 right now to close out Urban Dictionary.
by flclimax1 February 06, 2008
 
5.
The generic way of remedying an otherwise impossible situation.
"Alt+F4 sorts you out"
by Dongasaurus May 23, 2006
 
6.
Used in online games to 'pwn'/scam 'nobbies' due to the fact that this command closes your current open window.
l337: To duplicate money/items drop them on the ground and press alt+f4

Nub: OK!

(nub leaves game)

l337: haha, j00 got pwnt
by JimE Ray January 24, 2005
 
7.
Often used to discourage n00bs, this is often said while playing a game or talking in a chat room. Usually results in never seeing the n00b again.
n00b: I JUST WON A GAME!
Player: Press Alt + F4 please.
<n00b> has left the game.
by RyaN February 19, 2003