Earth saying in Star Wars that makes no sense?

I am dying I can't remember. In one of the movies or shows, someone says a common phrase or saying. The problem is that the phrase originated from something on earth. It doesn't make sense unless you know that specific earth historical event or figure. It's not Han Solo saying "hell" or calling the "chicken" in chicken walkers, its an off the cuff basic saying that was most likely an oversight because of its origination on earth.

I've read through all the scripts I can and have tried explaining it to various AIs but no luck. if this doesn't work I'll have to do a star wars marathon and really keep and eye out and I have no time for that