old one

noun3

1. •
   An elderly person, (sometimes specifically) one's father or mother; a senior member of a group or tribe, who preserves traditions.
2. •
   (Ireland) An old woman.

   • I was with him one day and he bought a book from an old one in Liffey street for two bob. — 1922
3. •
   (humorous) The devil.

   • You're the match of the old one for cleverness. — 1908