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.
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