An adjective describing something that is ridiculous in a Podunk manner. This is one of those special words exclusive to small townfolk. City people just don't fully understand.
You may wish to use this word when cattle escape from the sale barn and run around your neighborhood, or when the one cop in town is arrested by the neighboring town's cop for stealing the Fire Department's beer.
Person 1: Let's go steal my grandparents chickens!
Person 2: That's ridunkulous....let's do it!
Person 1: Where are we going to have the party?
Person 2: How about the barn?
Person 3: You're ridunkulous!