Nowadays, we know 'What a Revolting Development' mostly as Thing's catch phrase.
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However, it was coined as a catch phrase on Life of Riley, a popular 1940s radio sitcom.
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The series starred William Bendix as a working class family man named Chester Riley.
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The show was so popular that it even had a movie released based on it!
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It later made the transition to television. Many sitcom tropes were originated in Life of Riley.
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Daffy Duck used the phrase a lot back in the 1940s, as well.
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It's now become a ubiquitous phrase, appearing in other cartoons...
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internet memes, like this one about a cat not having a good day...
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or just general comic strip use, like this OTHER cat now having a good day.
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Once the Thing started using it, though, he sort of "owned" it in comic books.
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