How old would you say you have to be before you're considered a geezer? Geezerhood isn't determined by age. It's determined by behavior. I've seen geezers as young as 32. What kind of behavior are we talking about? Well, there are several litmus tests. What's the longest distance you've ever driven with your turn signal on? 28 miles. How fast were you going? 40 miles and hour in the fast lane. You, sir, are a geezer.