I don't even know
A stupid phrase invented by a guy who had no life and thought he was cool. It’s used to cover up how dumb you really are.
'I don't even know what you’re talking about,' he said, still eating cereal at 11 PM.
'I don't even know why I bother,' she said, crying into her coffee.
'I don't even know what day it is,' he said, still wearing his bathrobe.