A word comprised of the words know and noticed. When used, it refers to Prior Knowledge, of some sort, in a SARCASTIC MANNER. (Something someone pointed out that you already knew of, and therefore you would respond with "I knoticed") Usually used in text/aim/instant messaging conversations.
Doug: Hey dood, i just took a picture of martha drunk as hell! *posts on facebook*
Jimmy: yea, i knoticed, eveyones talking about it on facebook, dumbass.