A marathon of low quality movies or tv shows.
TV 'Fox is having another marathon of "Days of our Lives"' Angry Viewer 'God not another tard-a-thon'
by ...bleh... June 21, 2006
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A person (or group of people) that is so so dumb/stupid/both that he or she is essentially a festival of retardedness...
Hey TARD-A-THON, you got the answer wrong again...
by Balkanya May 29, 2003
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