teach your grandmother to suck eggs
idiomPart ofegg
teach your grandmother to suck eggs — idiom
1. To give advice to someone who is more experienced than you.
1.idiom
Definition
To give advice to someone who is more experienced than you.
Example
Trying to explain cooking to Chef Ana is like teaching your grandmother to suck eggs.
Don't teach your grandmother to suck eggs; she has been doing this for years.