NOTE: FIRST KNOWN USE OF "COUCH POTATO" WASN'T UNTIL 1976?
From a Ludwig blog post by Paola Tusa:
The first couch potato was named and affectionately shamed in Pasadena, California, in 1976, when Tom Iacino, an illustrator and designer, made a phone call to his TV loving friend Robert Armstrong, a cartoonist. According to an interview Iacino gave to Bon Appétit in 2014, Armstrong’s girlfriend picked up, and Iacino asked, “Hey, is the couch potato there?”. When she looked over and actually found him on the couch, she cracked up. Armstrong soon asked his friend to trademark that unplanned, brilliant coinage, and in 1979 they took part in an alternative parade, the Doo Dah Parade, with a floating showing a floor with a couple of couches on it. In 1983, Armstrong and the writer Jack Mingo published “The Official Couch Potato Handbook,” a sort of ironic hymn to slouching proudly in front of the TV, taking a stand against Californian healthy lifestyle in the 70s. Armstrong even created a newsletter called The Tuber's Voice that went into many editions.