An earlier version of wiktionary had that definition. Apparently it was deleted for lack of citation other than Tolkien which might be an in-universe term. > 1

An earlier version of wiktionary had that definition. Apparently it was deleted for lack of citation other than Tolkien which might be an in-universe term. > 1. A person in their twenties, between 20 and 29 years old. Possibly including 30-32. > 1954 "The Fellowship of the Ring", J.R.R. Tolkien > At that time Frodo was still in his tweens, as the hobbits called the irresponsible twenties between childhood and coming of age at thirty-three.