young at heart
US /jʌŋ æt hɑːrt/
UK /jʌŋ æt hɑːrt/

1.
ruhen genç, kalbi genç
having a youthful spirit and attitude, regardless of one's actual age
:
•
My grandmother is 80, but she's still young at heart and loves to dance.
Büyükannem 80 yaşında ama hala ruhen genç ve dans etmeyi seviyor.
•
He's always up for an adventure, truly young at heart.
Her zaman maceraya hazır, gerçekten ruhen genç.