From Longman Dictionary of Contemporary Englishpunch-drunkˈpunch-drunk adjective 1 informalCONFUSED very confused, especially because you have had a lot of bad luck or have been treated badly2 DSOa boxer who is punch-drunk is suffering brain damage from being hit on the head
Examples from the Corpus
punch-drunk• But how did that punch-drunk amateur do it?• It has made teachers and parents punch-drunk and over-burdened.• I just stood there like a punch-drunk boxer, taking the punishment she was handing out.• Indeed, standing in his vest, his eyes closed, he was swaying like a punch-drunk boxer.• Lewis's win provided more than cosmetic surgery to the battered, punch-drunk features of heavyweight boxing.• They led Halifax 8-4 at half-time only to collapse, punch-drunk, to a 72-20 defeat. 