A key that can be as little as 7/16'ths of an inch away from the mighty "A" key, yet, many do not know how to find it when their letters are in ALL CAPS.
I can't give a proper example, because if I try, then UrbanDictionary says:

We found an error in your definition.

* Example is written in all caps
by Kenthar April 7, 2004
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Caps Locks IS CRUISE CONTROL FOR COOL.
Noob 1: HEY BRO.
Noob 2: You liek caps locks?
Noob 1:ITS CRUISE CONTROL FOR COOL.
by LikesGeneveve April 21, 2010
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The most useless key on a keyboard.
Person 1: Caps lock is so useless.
Person 2: Yes, why do we need it when we have two shift keys?
by Cloud13 July 13, 2005
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Used during messaging for realeasing the "Fucking rage". Mainly used for enlarging the letters to look as though screaming at a person.
"I'm going to use the fuckin CAPS LOCK on your ass!!!"
by steven frey May 2, 2008
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Caps. Lock is a key on your keyboard located directly to the left of your 'A' key. As you know, capital letters are used for expressions that are meant to sound like they're angry or yelling, but, however..People abuse the use of the caps lock key and capitalize all of their letters to either sound excited or to be noticed. This is why a small organization has created a rule against caps lock being used for anything but the purpose for which it was created. This, is for three reasons.

1) It's incredibly obnoxious to read.
2) You just seem like you're angry all the time
3) There is no way for me to read that except for in a yelling voice.
PEOPLE WHO TYPE LIKE THIS ON EVERY SINGLE STATUS ARE INCREDIBLY ANNOYING AND NEED TO TAKE A TYPING CLASS IN WHICH THEY LEARN TO NOT ABUSE CAPS LOCK.
by 1758329ajkfdhsjkhfd May 31, 2011
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Description: It is a button on the keyboard next to the 'a'.
Use: If pressed, it makes every letter that you type into all caps. Some people on the internet use it to emphasize a person's statement.
Caps Lock is th button on the keyboeard above it is the tab. The one below it is shift.
TOMMY THAT'S NOT NICE! That sentence would universally be translated as yelling, even without the exclamation point at the end.
by Mistymuffin8 December 24, 2008
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Used when one wants to emphasize something. When something is REALLY something.
That's “CAPS LOCK” COOL or “CAPS LOCK” CRAZY!
by Gilldog January 21, 2013
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