I don't remember much about this movie. Only one quote. The problem is, I only remember it translated into Serbian while I think the original was in English. At first I thought the movie was Suburban Commando but I didn't find the scene with the quote.
The movie is from 70s,80s or 90s. There is a scientist experimenting with measuring intelligence with a machine. He attaches his machine to plants (including what is implied to be Ficus Benjamina) and appliances. The machine looks like EEG machine somewhat.
He attaches it to other character (he might be strongman type/bodybuilder). Once he reads his intelligence, he tells him the quote.
"Your intelligence is somewhere between ficus and toaster."
"Tvoja inteligencija je negde izmedju fikusa i tostera."
Or maybe the character asks him what the result of the measurement is and the answer they get is
"Somewhere between ficus and toaster."
"In the middle between ficus and the toaster."
That's all I remember.