Subs with a name based on vague terminology, an obscure pop reference, or an inside joke that doesn’t make any immediate sense with their ultimate purpose.
For example, 10th dentist. Even after clicking on the sub to read their stated purpose, the name still seems obscure.
Sure, if I wanted to google it I could, but shouldn’t a sub’s name be a clear enough upfront so people don’t have to waste their time hunting down an explanation? Plus, sometimes google isn’t much help contextually.