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

1.
sordo come una campana, completamente sordo
completely deaf or unable to hear well
:
•
My grandmother is as deaf as a post, so you'll have to shout.
Mia nonna è sorda come una campana, quindi dovrai urlare.
•
I tried to tell him, but he's as deaf as a post.
Ho provato a dirglielo, ma è sordo come una campana.