Nelly Ruckus is Uncle Ruckus' grandmother. She was very abusive towards Mister Ruckus (which is probably one of the reasons why Mister was so abusive towards Uncle Ruckus). She is the secondary antagonist of the episode The Color Ruckus.
Nelly reunited with Uncle Ruckus after he was kicked out of his home when news of her impending death came (according to Mister Ruckus, she had said so multiple times). She criticized Ruckus for his living habits, and later followed him to the Freeman home. After seeing how much more succesful the Freemans' were, she decided she wanted to die in that home, much to the dismay of Robert and the boys. The rest of the Ruckus family came over to watch her die, which she did after Ruckus' argument with his father. Then later, at her funeral, Darryl read her final words to her family, which included her two wishes: one was to die, the other was that Mister would reach the grave before her. Both wishes were fulfilled when, during the ensuing argument between Uncle and Mister, Mister flared up his old back injury and fell into her open grave before her casket could be lowered in, dying of a broken neck. Technically Nelly's wish wasn't fulfilled because when she meant that she wanted her son to reach the grave first probably meant she wanted her son to die before she did.