Ruh-roh

[Tina]

expression used in place of [uh oh]
derived from the popular cartoon show, [Scooby Doo]

[Couch Potatoe]

A Hanna-Barbera canine cartoon saying for Uh-oh, beginning with THE JETSONS Astro (1962) and continuing with Scooby-Doo in the Seventies.
Astro tended to speak a kind of English except that words with beginning consonants were replaced with an R, and R was inserted in front of vowels.
Scooby-Doo was less fluent, but was given Ruh-roh as a kind of running gag when things were going bad.
Now Ruh-roh is sometimes used as a jocular trope where dogs are concerned, as in a recent news story about a dog who was accidentally released by Air Canada from his cage at the San Francisco airport. Rough meaning: I goofed or Im in trouble.