A nightmare in which a person, specifically a nerdy person, forgets some of their nerd knowledge, such as a complicated math equation or a video game cheat.
A phenomenon resulting from an attempt to pass off a fallacious story as factual, only to subsequently have the story proven wrong, resulting in exhibited defensiveness, bitterness and embarrassment on the part of the teller of said false story.
Synonym: PWNT
The term was derived from the following thread (created by a poster names "nerdster") on the NC State message boards:
http://mbd.scout.com/mb.aspx?s=178&f=2535&t=2721704
Note the weak attempts at insulting those who are laughing at the expense of him having "nerdstered" himself throughout the thread.
any sort of minor event which causes a nerd to flip out, freak out, or generally over-react. the rest of the non-nerd population usually remains quite calm and unaffected by a nerdtastrophe
the sysadmin was having a nerdtastrophe over the server shut-down.
He proposed to his girlfriend in a Mario suite and jumped up to get the ring out of a question mark box. He's a nerd and she's a nerd. That is what we call a nerdmance, ladies and gentleman.