To type in all capital letters as a loud or aggressive show of manner towards someone or something.\n\nAlso used as a way of yelling during instant and/or text message conversations.\n> I've been bustin CAPS since I was old enough to type.\n> 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!!\n