Here are some jokes for an 80-year-old:
1. Why did the old man fall in the well? Because he couldn't see that well.
2. Why did the old lady fall over? Because she couldn't see very far.
3. How does an old man stay warm in the winter? By sitting in front of a birthday candle.
4. Why don't old people take up bowling? They don't want to get in a gutter.
5. Why don't old people play hide-and-seek? Because nobody wants to find them.
6. What time is it when an old man falls down the stairs? Time to call the undertaker.
7. What do old people call a party? A chance to sit down.
8. What do old people call a nap? A chance to dream.
9. What do old people call a vacation? A chance to get out of town before the nursing home catches them.
10. What do old people call a retirement home? A prison with better food.