The strange business history of the Ouija board
thehustle.co
thehustle.co
Why I too suck as a businessman.
(Not in this article but another I read suggesting “oui” + “ja” to get “yes-yes” in French/German.)
I think most Americans are used to seeing the commercial-style boards with the teardrop shaped indicator, not a drinking glass, so that idiom would not translate.
Is it used as a shorthand for anything spooky? "We are doing science here, not glass-displacement!"