A: Aunt Mary said my new haircut is awful. What do you think?

B: I think it’s fine. Just ignore the opinion of a fuddy-duddy like her.

Note: This idiom refers to an old-fashioned and foolish type of person. There are several citations in American newspapers from the end of the 19th century that relate to a pair of fictional wags called Fuddy and Duddy. Whether the expression “fuddy-duddy” was already known and the names were taken from it, or whether it was the other way round, we can’t tell. Duddy was a Scottish term meaning ragged. Fud, or fuddy, was a Scottish dialect term for buttocks.