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