The act of Majorly Owning Noobs, or MNO. MajorNoobOwnage only can occur when a professional gamer who is above MLG status gets matched up with people who have never been played before, and thus it is only an extreme condition which can only be performed by a pro.
1. "Dude, there's this guy named MajorNoobOwnage in our game... we're about to be MajorNoobOwn'd."
2. "Crap we're matched up against a pro, prepare for the MajorNoobOwnage."