1
when you see a person and think they're a total stranger even though you just met them
'Hey man, do I know you?' 'No, I think you just forgot your own name.'
'You're the guy from the bar, right?' 'Dude, I don't even know my own last name today.'
'You're the one who texted me last week, right?' 'I don't even know who I am, let alone my last name.'