Wikipedia:Articles for deletion/Teaching grandmother to suck eggs
My  turned up nothing that supports this as a topic beyond the dictionary definition. If any coverage could be shown beyond that (i.e., history etc.) then I could see a rationale for keeping. It is odd that the similar concept of Mansplaining is so much more easy to substantiate despite being only recently created - but this is an example of Wiki's recentism
— User:FOARP, 10:28, 12 February 2019 (UTC)
Stance: delete
Cited policy: WP:BEFORE (Wikipedia:Articles for deletion)