old rogue; elderly bon vivant; free-spirited older person
A playful, somewhat humorous term for an older person who lives freely, ignoring social conventions, often with a hint of mischief. Not a clinical or derogatory term.
That old rogue apparently goes out to bars every night.
He rather enjoys being called an elderly bon vivant.
Refers to delinquency or a delinquent, typically younger. 不良老年 applies the concept humorously to an older person.
Simply means old age. 不良老年 adds the nuance of a freewheeling, unconventional lifestyle.
A modern coined term from 不良 (delinquent, unruly) and 老年 (old age), likely influenced by the phrase 不良少年 (juvenile delinquent). The exact origin is uncertain, but it appears in contemporary Japanese as a lighthearted label.