Old fogey
Old fogey used to describe someone as a bit old fashioned: out of touch with modern things.
In 1811 an Old Fogey was a nick name for an invalid, wounded soldier; derived from the French word fougeux, fierce or fiery. The modern sense has changed the use a little, but there is still the element of invalid in the saying.
Young fogey was humorously applied in a British context to some younger-generation but rather buttoned-down writers and journalists — examples being Charles Moore and (for a while) A. N. Wilson. The term is attributed to Alan Watkins writing in 1984 in The Spectator.