OLD HAT


Meaning of OLD HAT in English

ˌold ˈhat BrE AmE adjective [not before noun]

if something is old hat, a lot of people have said or done the same thing before and it is therefore not new or interesting:

Most of this is probably old hat to you, isn’t it?

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.