an old fogey/fogy

old fogy

An older person, especially one whose views or attitudes are considered boring or old-fashioned. Ah, don't mind that old fogy. He's just cantankerous because he isn't up to speed with the way of today's youth. I've fully embraced that I'm going to be a stodgy old fogy when I get older.
See also: fogy, old
Farlex Dictionary of Idioms.

an old ˈfogey/ˈfogy

(usually disapproving) (usually of an older person) a person with very old-fashioned or traditional views, opinions, etc: I’m not such an old fogey that I can’t remember what it was like to be a student.
A young person with old-fashioned views, style of dress, etc. is sometimes called a ‘young fogey’: He’s one of the young fogies who write for the ‘Spectator’.
See also: fogey, fogy, old
Farlex Partner Idioms Dictionary

old fogey

n. an old-fashioned person; an old man. My uncle is an old fogey. He must be the most old-fashioned man in the world.
See also: fogey, old
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • fogey
  • fogy
  • old fogey
  • old fogy
  • bolt bucket
  • cat
  • make old bones
  • a piece of old tackie