number six

noun4

1. •
   A defensive midfielder.

   • The number six adds additional defensive cover, balance, screening and protection just ahead of the central defence. — 2022
2. •
   The batsman who bats sixth.
3. •
   (Nigeria, informal) One’s brain or common sense.
4. •
   (slang, no longer used) Synonym of Newgate knocker (“a lock of hair worn twisted back toward the ear”).