Biblical figure known for his long life, often used metaphorically.
El Matusalén de la familia siempre tiene historias fascinantes que contar sobre el pasado.
The Methuselah of the family always has fascinating stories to tell about the past.
A pesar de su edad, él se siente tan enérgico como un matusalén.
Despite his age, he feels as energetic as a Methuselah.