When I was little, I thought "Alzheimer's" was actually called "Old Timer's." It sounds the same (you just said it out loud to yourself, didn't you?), and actually makes way more sense; I don't know any young timers who have it, do you?
In fact, I'm gonna go out on a limb here and propose that we should officially switch it to Old Timer's disease. Here's a sample exchange:
Someone: "Ugh, my grandpa tells the same story over and over again."
Someone Else: "Oh, does he have Old Timer's?"
The Original Someone: "No. He's just an asshole."
See?! How much better is that? I'm stickin' to my guns here.