When a person acts like somebody with a mental disorder at a certain point in time, but in fact is sane
Devon plays the bass guitar like a mucktard
by Muck April 16, 2004
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A group of stupid ass people that don't listen at all, they tend to do weird things and don't care what other people say
Wow u guys are stupid enough to say that u have gone full Mucktard
by Lyla May 17, 2016
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It's simply a short term for mother fucking retard.
Why did you stick your fingers in a fan that was on, you mucktard!
by HeathsNutz August 30, 2021
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(n) What you call someone after they make a stupid remark. A mixture between a muckfluck and a retard.
Person: Do you think Pang Long has groupies?

BBI: WTF!? You mucktard!
by Beanerous Brokus I November 21, 2006
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