IIRC it is from the Soupy Sales show where one of the characters, a dog, couldn’t say uh oh and instead said rutt rohh
Thanks-—my God,Soupy Sales——haven’t heard him mentioned in years.
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Did Scoobie-Doo steal it from Soupy Sales? because Rut Roh was Scoobie the dog saying uh oh in the cartoon series. it was one of his signature phrases.