look up any word, like bae:
 
1.
To type in all capital letters as a loud or aggressive show of manner towards someone or something.

Also used as a way of yelling during instant and/or text message conversations.
I've been bustin CAPS since I was old enough to type.

She was all mad and bustin CAPS in our instant message conversation. I tried to get her to undo the "caps lock" key, BUT SHE JUST KEPT YELLING!!
by btran July 06, 2011