I used it in conversation with my spouse the other day and was legitimately surprised to realize that it wasn't in common usage. Or that I apparently had failed to use the term in their hearing in the past 20 years of us knowing each other.

"Cargo Cult Science" — Richard P. Feynman's 1974 Caltech commencement address:

https://calteches.library.caltech.edu/51/2/CargoCult.htm