SOMEONE WHO FEELS THE NEED TO USE CAPITAL LETTERS ALL THE TIME TO MAKE COMMENT MORE NOTICEABLE
a guy:I'm going to respond to that cap lock bastard to show him how dumb he is............cap locked responds:go fuck your mom trailer hicky trashbag motherfucker I love my CAP LOCKED
by PHRASE giver December 25, 2013
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A key on the keyboard that tweenie girls, newbies and the mentally unstable insist on pressing and using for their entire forum post/IM/text message for reasons unknown.

Perhaps they think it looks cool, or maybe they can't do joined-up writing yet and write in block capitals.

It is the most annoying button in existence.

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OMG LYK WHY CANT I UZ SHIFT TO LYK PROPERLY CAPITALIZE MY SENTNCES?!?!? CAPS LOCK IS JUST LYK SOOOOO COOOOL THAT I MUST TYP EVRYTINK I EVR THINK OF WIT IT???!?!

And such...
Caps lock example included at the end of my definition because UD won't let me abuse Caps Lock in the example
by Your Uncle Cordelia September 16, 2006
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the button on a key pad that makes the letters typed after pressing it in capital letters. it can also be used to give the affect of angryness. OH FOR THE SAKE OF PETE I PUSHED THAT DAMN CAPS LOCK BUTTON AGAIN!
caps lock off, CAPS LOCK ON, caps lock off CAPS LOCK ON, caps lock off, CAPS LOCK ON.
by James Watson December 9, 2004
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1) An annoying button you press accidentally when you least expect it and bombards you WITH SENTENCES LIKE THIS.

2) A skill in which all players of text-based MMORPG's do not seem to be able to turn off until level 3
1) Very Important Business Man: Your not going to mock how loud I talk are you?
You: * accidentally presses caps lock key* NO, NOT AT ALL

2) TextBasedNoob777: HELP!1?!? HOW PLAYS THIS GAME!11!!

by Sp133n! April 9, 2009
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An aggressive, or excited attitude characterized by its loudness. The term originates from electronic communication. Sentences and words spelled with the Caps Lock button turned on --in other words, all upper-case-- is the modern written equivalent of shouting at someone. It usually signifies anger, or sometimes intense excitement.
Kelly looked at Lisa incredulously. For a moment she was speechless. "WHAT THE HELL?! HOW COME YOU CAN'T MAKE IT TO JAKE'S BIRTHDAY PARTY?!" Lisa, startled by Kelly's shouting, replied, "Why you gotta get all caps lock on me?!"
by Hipster Dufus February 22, 2008
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A DEVICE IMPLANTED IN A KEYBOARD DESIGNED EXCLUSIVELY FOR PEOPLE TO ACCIDENTALLY PRESS BEFORE ATTEMPTING TO TYPE IN THEIR PASSCODE
person 1: HOW DO YOU TURN CAPS LOCK OFF?
person 2: YOU CANT ITS THE COMPUTERS WAY OF SAYING IT WANTS YOU TO LEAVE AND NEVER COME BACK. DONT TURN OFF YOUR COMPUTER!!!
by some white millenial October 10, 2017
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