bonce

Definition

Slang

  • noun the head. Bonce was a mid-19th-century dialect and schoolboy term for a big marble. The word was soon adapted to mean the head, and in that sense remained popular in young people’s usage until the 1960s. It now sounds old-fashioned or affectedly upper class, but may be due for revival, in common with other obsolescent but ‘jolly’ words.
http://www.dictionarycentral.com/definition/bonce.html