feel (one's) age
To realize or be reminded that one is aging, usually because one is experiencing the negative effects of the aging process. My joints are so sore—I'm really feeling my age these days.
feel your age
become aware that you are growing older and less energetic.ˌfeel your ˈage
realize from your physical condition, opinion, views, etc. that you are getting old: He’s not as energetic as he used to be — beginning to feel his age, I suppose. ♢ Listening to this rap music really makes me feel my age.
