1 definition by Jimbob Dawgknob

A combonation of the words "mega" and "retard". Often used as an insult whenever someone says something very obvious or very stupid.

Can also refer to the combined forces or impact of two or more annoying acquaintences.
"My friend just asked me what the difference is between third degree murder and third degree burns."

“I don’t know why you hang out with that megatard

or:

"Oh no - Chris and Big Andy are both coming to the party tonight. Don't let them in the same room, or they'll form into MegaTard and we'll never get rid of them!"
by Jimbob Dawgknob February 3, 2006
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