When your waistband is closer to your man boobs (moobs) than your belly button. Bonus score if your waistband is high enough to smell of your deodorant.
Wow, you've got the deluxe model! You know you're old when you're envious of someone else's nose hair trimmer!
You know you're getting old when you "still got it," but can't remember what to do with it. You know you're getting old when you take to speeding so you don't forget where you're going. You know you're getting old when every name in your "little black book" ends in "M.D."
Your youngest kid is celebrating his third wedding anniversary. And I had the blessing of conducting the wedding ceremony