an old wives' tale

old wives' tale

A now-debunked story or idea that was once believed, often superstitiously. How can you believe in that old wives' tale? Oh, that's just an old wives' tale! A broken mirror does not guarantee seven years' bad luck.
See also: old, tale
Farlex Dictionary of Idioms.

an old wives' tale

COMMON An old wives' tale is a belief that a lot of people have that is based on traditional ideas, often ones which have been proved to be incorrect. My mother used to tell me to feed a cold and starve a fever. Is it just an old wives' tale? It's not just an old wives' tale, you know, that full moons and madness go together.
See also: old, tale
Collins COBUILD Idioms Dictionary, 3rd ed.

an old wives' tale

a widely held traditional belief that is now thought to be unscientific or incorrect.
The phrase (and its earlier variant old wives' fable ) is recorded from the early 16th century, with the earliest example being from Tyndale's translation of the Bible.
See also: old, tale
Farlex Partner Idioms Dictionary

an old ˈwives’ tale

(disapproving) an old idea or belief that has proved not to be scientific: When you’re expecting a baby, people tell you all sorts of old wives’ tales. The belief that make-up ruins your skin is just an old wives’ tale.
See also: old, tale
Farlex Partner Idioms Dictionary
See also:
  • make old bones
  • bolt bucket
  • geezer
  • a piece of old tackie
  • have whisker
  • be (as) old as the hills
  • any old
  • mossback
  • bucket of bolts
  • of old
References in periodicals archive
However, an old wives' tale about baby bumps may be serving as a clue when it comes to whether or not Meghan Markle will have a son or a daughter.
It's possibly an old wives' tale, but it is said that if you rub bat's blood on a new born child they will not grow hair, even into adulthood.
According to an old wives' tale this can be linked to babies being born with an above-average amount of hair.
There's an old wives' tale that supposedly predicts the baby's gender based on how fast or slow their heart is beating.
GARY C ARY CRUDEN SOME voters could leave it until later in the day to cast vote if an old wives' tale is to be believed.
No, it's not an old wives' tale told to Jewish children to keep them on the straight and narrow.
We didn't want to find out but the midwife was convinced it was a girl due to an old wives' tale - apparently if the heart beats faster it's a girl.
This week's winner is Pauline O'Dowd, of Nottingham, who says: "I thought it was an old wives' tale that yucca plants like tea.
It's an old wives' tale that cows lie down when it's about to rain.
Evidently there are twins on both sides if you look back far enough, although Portman dismisses the idea that they run in families as "an old wives' tale".
A NO, it's just an old wives' tale. There is no evidence calcium deficiency during pregnancy affects the strength of your teeth.
There's an old wives' tale that if you get heartburn during your pregnancy your baby will be born with a lot of hair - I had really bad heartburn.
I think it's an old wives' tale - it's just what your mother told you but nobody really knows."
There's an old wives' tale in that country that the team who take the pitch first always loses.
RE: SMACKING: ``Spare the rod and spoil the child'' is not an old wives' tale as stated by Sue Woolmore, NSPCC Public Policy Adviser for the North (Daily Post, November 9 ).