A pugilist skilful in delivering blows on the head.(noun)
The Century Dictionary (Public Domain)
Use "nobber" in a sentence
"You really want a nobber [assistant] at this game."
"You keep at work and get a crowd watching you, and the nobber comes casual-like round the back of them."
"Motability is blatantly abused … One nobber in our street who was 'disabled' and couldn't work got busted using his car to deliver for a local florists, he's even specified an estate so the vehicle would be more suitable."