(as) deaf as a post
US /əz dɛf əz ə poʊst/
UK /əz dɛf əz ə poʊst/

1.
sourd comme un pot, complètement sourd
completely deaf or unable to hear well
:
•
My grandmother is as deaf as a post, so you'll have to shout.
Ma grand-mère est sourde comme un pot, donc tu devras crier.
•
I tried to tell him, but he's as deaf as a post.
J'ai essayé de lui dire, mais il est sourd comme un pot.