Knob-Scratched 

The act of getting a haircut (on the regular head)

I'm going down Split Ends to get my knob scratched.

Knob-Scratched by WS7 September 4, 2003

knob scratcher 

a hairdresser in Birmingham, UK

"I'm off to get my knob scratched"

"what do you do for a living?
I'm a knob scratcher"

knob scratcher by Rangie Tom September 23, 2005