noun. A Ned Flanders-style turd.
Real citation: "For Yer Poppa, it's been a life of dooks, dookies, duchesses, droppin' ducats, dukin' it out and bustin' some duke-diddly-ookies. But seriously, until I beheld what a crap movie this Marmaduke appears to be, it had never occurred to me that a 'marmaduke' could be a 'huge shit.' Thank you. It'll be there when you need it."
(June 3, 2010, Pop Cesspool, http://www.popcesspool.net/2010/06/marmaduke-the-magnum-euphemism-freshly-discovered.html)
Made-up citation: "Don't bring a duke-diddly-ookie to a nuke-diddly-ookie fight."