Teaching grandmother to suck eggs
Teaching (your) grandmother to suck eggs is an English language saying that refers to a person giving advice to another person in a subject with which the other person is already familiar (and probably more so than the first person).
Origins of the phrase
The origins of the phrase are not clear. The OED and others suggest that it comes from a translation in 1707, by J. Stevens, of Francisco de Quevedo (Spanish author): "You would have me teach my Grandame to suck Eggs".
Notable early uses
I remember my old schoolmaster, who was a prodigious great scholar, used often to say, Polly matete cry town is my daskalon. The English of which, he told us, was, That a child may sometimes teach his grandmother to suck eggs
- Letter from Percy Bysshe Shelley to Leigh Hunt, 15 August 1819: "But what am I about? If my grandmother sucks eggs, was it I who taught her?"
The use of the phrase "Suck-egg" for "a silly person" is dated back to 1609 by the OED.
- Mansplaining, a gendered term describing a similar phenomenon
- "The Free Dictionary". Retrieved 2009-05-07..
- "Teaching grandmother to suck eggs: Meaning, Origin". Word Histories. Retrieved 19 February 2019.
- "egg, n.", §4b, Oxford English Dictionary Online, 1st edn (Oxford: Oxford University Press), accessed 27 July 2019.
- "Teaching one's grandmother to suck eggs". World Wide Words. Retrieved 2009-05-07.
- Henry Fielding. "The History of Tom Jones a Foundling, Chapter 12". Retrieved 2009-05-07.
- "alt.usage.english". Retrieved 2009-05-07.