“Hey, buddy, how are you doing? I haven’t seen you in years!”
We’ve all been there - you’re out in a store or restaurant, and suddenly you see someone you recognize, and they recognize you - but you just can’t remember their name. You try hard, but you can’t seem to come up with that name you once knew well, so you just call them “Buddy” or “Pal”, or some other vague name like that, trying to conceal your forgetfulness.