Cosby on Mums. Source: Bill Cosby. I love 'it when mothers get so mad ?' an' t remember your Trix. name. 9 Come here, Roy, er, Rupert, er, Rutabaga... what is y Cosby on Mums Source: Bill I love 'it when mothers get so mad ?' an' t remember your Trix name 9 Come here Roy er Rupert Rutabaga what is y