A mix between what is rediculous and what is stubbornly asinine: resembling an ass or donkey. Hence the "donc" coming from donkey.
A robber sued a man he tried to rob for psychological damages and reckless endangerment, after the owner of the house shot a hole in his roof to scare the robber away. The robber won the case. This is redonculous
by SherLeon May 20, 2006
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Redonculous is a variation of the word "ridiculous." Use it coz it sounds cool.
That was the most redonculous thing I've ever heard.
by black_magic_127e June 13, 2005
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The disease of laughter or utter nonsense. It is classified as extremely contagious. Symptoms include random smiling, laughter for no reason, the uttering of random words or the carrying out of silly actions.

A man called Buzz Killington claims to have discovered the cure, but his doctorate has been taken away due to allegations that he murdered Buzz Lightyear and Buzz Aldrin, two famous astronaughts.
Kristen saw a squirrel and started laughing on the way to school today. I think that's why Gabby also has redonculitis
by DJ. G93 March 2, 2011
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Beyond ridiculous, often in an amazing way. Most famously used in an episode of “Friends” where a very fit woman’s body was referred to as redonculous.
That chocolate dessert was absolutely redonculous.
by Skippy99b November 26, 2018
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