(as) deaf as a post informal
This idiom is likely offensive to others.
Her grandfather's as deaf as a post.
My grandma can't hear you even if you shout; she's deaf as a post.
After years of listening to very loud music, now Linda is deaf as a post.
To act recklessly; to have a desire for death
Secrets cannot be revealed by the dead.
Completely lifeless or defunct.
"(as) deaf as a post" is also "deaf as an adder". The first idiom has its origin in John Palsgrave's Acolastus (1540).
This phrase is used to describe something very modern or updated or something that no longer looks like what it's used to.
It has been a long time since I left my high school, and now I have to admit that it's certainly not your father's high school anymore.