look up any word, like pussy:
 
1.
F10
F10 is something you say to idiots on Counter-Strike: Source who ask you stupid things.

If that doesn't work, you tell everyone on the server that F10 was patched by Valve and now it insert believable function here
Unnamed: "How u git tha bazooka?!"
Heineken: F10
Unnamed left the game (Disconnect by user).
by Heineken January 23, 2005
 
2.
f10
F10 is a n00b filter for Counter Strike to get rid of all those gullable noobs! Just make a wild reason for them to push it and they will instantly be quit out.
"PRESS F10 FOR FREE LAWNCHAIRS!!" and sometimes "DON'T PRESS F10 FOR LIKE 10 MINUTES! IM WORKING ON SOMETHING AND IF YOU DO IT WILL QUIT ME OUT" --This one usually works the best.
by Mr. Cheapwood December 23, 2004
 
3.
F10
F10 is the universal button for awesome in any GoldSrc or Source-based game. But as of recent light, in said games, VALVe is butthurt about all the e-mails they get from people who have fallen prey to the F10. So, they made it come up with a window now that asks you to quit.
Someone: Press F10 for infinite ammo.
TF2fag: Oh, I'm not falling for that.

(Here's how to trick them)

*spamming crappy music*
13-year-old-kid: How do I mute?
Anonymous: F10 + ENTER for infinite mute.
13-year-old-kid has left the game. (Disconnect)
by Anonymous  April 18, 2009
 
4.
F10
The answer to any question asked on Counter-Strike Source.

Also way to get rid of noobs

Player 1: F10 for hackz
<noob has left the game>
<noob joins the game>
<noob joins CTs>
Noob: LOLZ WTF MAI CS CRESHED!
Player 1: Does any1 know how to spray your tag?
Player 2: F10


Player 1: F10 for hackz
<noob has left the game>
<noob joins the game>
<noob joins CTs>
Noob: LOLZ WTF MAI CS CRESHED!
by Bucketface February 13, 2009
 
5.
F10
we use it to clock out at work; means to leave for the day, bounce.
ite y'all i'm fittnih F10 up out. deuces!
by choozyoozy April 05, 2003