the act of eating nothing but corn for 24 hours as to accomplish shitting pure corn so that you may take a picture of it and spam a persons friend networking page with it. The purpose is to anger them. It shows your commitment to pissing them off.
Justin: "Hey I spammed Ryan's myspace with my cornshit yesterday, he was so mad."
Randy: "Nice bro, LOLCORNSHIT always gets em good."