old saw(redirected from that old saw)
An oft-repeated saying, maxim, or proverb; a cliché or hackneyed expression. My dad has a few old saws he never hesitates to share with my kids whenever we come to visit. A: "An apple a day keeps the doctor away!" B: "That old saw is as untrue as it is annoying!"
A proverb or maxim, as in Mom's always repeating the old saw, "Haste makes waste." This term uses saw in the sense of "saying," and old in the sense of "wise" rather than old-fashioned. [Second half of 1400s]