老朽成年

'老朽成年' (Lǎo xiǔ chén nián) refers to someone who considers themselves to be old ('老朽' normally referring to old and rotten wood), even though technically still in adulthood. It could express feeling prematurely aged, maybe due to heavy burdens of responsibilities. The owner of this name may be experiencing emotional exhaustion and lack vitality despite his chronological age.