be young at heart

be young at heart

To behave in a way or have a disposition that is more youthful than one's age. Grandma is still so young at heart—I can't believe she's taking dance lessons at 90 years old!

See also: heart, young

Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

be, stay, etc. young at ˈheart

(of an old person) still feel and behave like a young person: He says that the secret of living to 100 is to remain young at heart.

See also: heart, young

Farlex Partner Idioms Dictionary © Farlex 2017