Meself, it was great to get to do-over for 6 months!
When I think of the word "geezer", I thinks of someone who's miserable, hates change, and complains a lot. Unfortunately, it frequently has something to do with age, but being "old" isn't a requirement. I think we have more risk of being miserable, hating change, and prone to complaining when we get older. I might qualify, on a bad day, but I'd never think of Jerry as a geezer.
One thing that I've been noticing is who was alive when I was younger. Charlie Chaplin, Groucho Marx, Kate Smith, Bill "Bojangles" Robinson, the entire Rat Pack... sometimes I think I should make a list, but then I realize how long it would take me.