Mudcat Café message #1680182

The Mudcat Café ^TM
Thread #89170 Message #1680182
Posted By: mack/misophist
27-Feb-06 - 08:59 AM
Thread Name: BS: teaching grandmother to suck eggs
Subject: RE: BS: teaching grandmother to suck eggs

What it means is 'don't lecture to people who have more knowlege and experience of the topic than you do'. As for where it comes from...