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usually used as an insult which means that you are a disliked person who has a very small penis.
Fred:what the are you doing you Nobbit?
George: hey there's no need to be like that
by Pery Et dan December 08, 2004
Something you call someone when they say something random and you dont know how to respond.

Nobbits are generally awesome people.
Shut up, you Nobbit.
by AmazingNobbit March 13, 2011
Something that is unemailable because it is too big
I'll have to diskit, its a nobbit
by Gausie January 30, 2005