an oldie but (a) goodie

an oldie but (a) goodie

1. Something that was created a relatively long time ago but which is still excellent by today's standard. Ah, the White Album—that's an oldie but goodie! Here, try this book. It's an oldie but a goodie.
2. A person who is advanced in years but is very likable, reliable, helpful, etc. I'm giving you a desk next to Martin. He's an oldie but goodie who will help show you the ropes. A: "You're an oldie but a goodie, Aunt Lily!" B: "Hey, I'm not old!"
See also: but, goodie, oldie

oldie but goodie

n. something (or even someone) that is old but still likable. Mary is an oldie but goodie. I’m glad she’s still around.
See also: but, goodie, oldie