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4.
1) One who is technically adept but otherwise quite stupid.

2) One who fancies himself a nerd but is actually technically inept.
The nerd-tard thinks a group of cellphones can pop popcorn.
by AD-92129 September 01, 2011
 
1.
Someone who is a nerd and a retard. Used when they do something stupid and nerdy.
Angela is such a nerdtard.
by Jessica Gravel April 29, 2004
 
2.
those kids at school who are really dumb but get good grades cause they hang out with the nerdy kids, study way too much and suck up to teachers

they have no real friends
raji is such a nerd tard, she asked a million questions about the same thing
by thebiggestbossintheworld May 20, 2009
 
3.
A person who has the physical attributes of a "Nerd" but also has the mental capacity or a "Retard".
Karl - Oh man, that kids such a nerd, but he gets terrible grades.. and is really stupid.

Mike - Nah hes just a Nerdtard.
A nerd and retarded.

Karl - Ahh
by handspringmatt July 19, 2009