I know, I know
A person says this when they're too stubborn to listen to something obvious and just want to be right even if they're wrong.
'I know, I know!' he said when his friend told him the answer was 5 and he still said 3.
'I know, I know!' she said when the teacher explained it again and again.
'I know, I know!' he said after the cop told him to stop fighting with the other guy.