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]
Words That Are Older Than You ThinkThe first citation of "OMG" in the Oxford English Dictionary appears in a 1917 letter from the British admiral John Arbuthnot Fisher to Winston Churchill.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.