(idiomatic) Having the joy and vitality associated with younger people, despite one's own advanced age.

Alternative form of foo yung

plural of young fogey

(idiomatic) A young and overly conservative person.

(paleontology) Any member of the Younginidae.

plural of younginid

plural of younger

Alternative form of you can't put an old head on young shoulders

Young people inevitably lack the experience and wisdom which come with age.

Well-regarded people who are morally upright, kind, and beneficent tend to die at a younger age than do most people.