The phrase "old adage" refers to a well-known saying or proverb that has been around for a long time and is commonly accepted as true or wise. Full definition
Regardless of whether you're buying stocks or betting on sports, the age - old adage of buying low and selling high is a reliable means of long - term returns. (sportsinsights.com)
As the age old adage goes, live by the sword, die by the sword. (slickstermagazine.com)
The age old adage «women are better at multitasking than men» may have some scientific merit. (sciencedaily.com)