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1.
A nerd who is truly beyond redemption. The kind of nerd that other nerds make fun of.
You read the Halo novels? What kind of Ultra Nerd are you?
by CronoT August 24, 2008
 
2.
Also known as a Tessa, it describes someone who is extermely nerdy. Someone that is more nerdy than a "SuperNerd" but less than a "GigaNerd".
OMG Tessa, you are the UltraNerd.
by crazy4harrypotter March 29, 2006