what occurz when a noob does something mighty noobish, such as killing himself...with a stick...or superglue
hehehehe did u see that noobtrosity, what a fucktard!!!
Originated from a videogame that would give you a "killtrocity" award. This was a very rare and amazing event. So whenever a noob does something spectacular, that is a noobtrosity.
"Dude, you just got pwned by that uber noob! What a noobtrosity!" or "Dude, youre so bad, youre a noobtrosity!"