Contrary to grundoon's story, I didn't invent the phrase.
I got it from my then husband.
And here is an earlier source:
http://www.art.com/products/p15063520741-sa-i6848750/george-booth-i-ve-got-an-idea-for-a-story-gus-and-ethel-live-on-long-island-on-the-n%E2%80%A6-new-yorker-cartoon.htm
Ah, George Booth, and a 1970 cartoon.....
http://tvtropes.org/pmwiki/pmwiki.php/Funny/TheNewYorker
I remember that Charles Adams cartoon. I have my grandfather's Charles Adams book. My grandfather had a home office with a high ceiling and a wall of bookshelves. I loved it. There was a shelf of cartoon books, many from The New Yorker. I spent hours looking at the cartoons long before I understood many of them. Any cartoons. In my early teens I found my father's stack of Playboy magazines in the attic. I liked the cartoons best, Little Annie Fanny and others. I puzzled over certain words: douche was quite mysterious. I did open the pin up and look at it but I was far more interested in the jokes on the back of the pin up page.
My older cousins had comic books at our lake cabins: Archie and Richie Rich, but also various war comics. I discovered Spiderman and got a subscription and was off.....