Garrison Keillor introduced the term "Norwegian bachelor farmer," which is a bit like the male equivalent of spinster.
Is there a male equivalent of spinster that works in the UK? I considered "confirmed bachelor" but rejected it as too neutral.
For reference, some definitions:
Spinster: An unmarried woman, typically an older woman beyond the usual age for marriage. In modern everyday English, spinster cannot be used to mean simply ‘unmarried woman’; it is now always a derogatory term, referring or alluding to a stereotype of an older woman who is unmarried, childless, prissy, and repressed. (Oxford)
Norwegian bachelor farmers: A group of unmarried men who live on the outskirts of town and have little to no social skills or hygiene habits. (lakewobegon.wikia.com)
confirmed: (of a person) firmly established in a particular habit, belief, or way of life and unlikely to change their ways. ‘a confirmed bachelor’; ‘a confirmed teetotaller’ (Oxford)
Note: I don't care whether it's a single word, a phrase, an idiom -- anything is fine. I have tentatively created a general term request tag for these situations. If the moderators are not happy about the tag, I trust they will edit my tags and remove the new tag I made.