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1.
1. A mix of the words "numpty" and "retard"
2. Usually used as a childish insult or an act of stupidity.
1. "Oh my God, Danny, you're such a numtard!"
2. "Yeah that's right, just numtard for someone else..."
by XPURPLElemonadex May 18, 2009
 
2.
Someone who is really stupid!
Just do us a fav...and shut up!
by Shorty July 25, 2004