v. When the female uses her head/skull and rubs, pushes against, or repeatedly bumps her head on the males penis and she does not use her face or mouth.
"Damn nappy-headed hippies backpacking Thailand -- didn't someone tell them they can buy a headjob for 40 baht?"
2.) To have someone gag on your sausage
"he'll have to give one to get it"
It was a mistake to give John Howard a headjob