when the male participant rubs his penis up and down on the female or other male's neck to induce sexual pleasure.
a female can also straddle a man's neck while he makes acoustic noise causing his neck to vibrate, thus inducing sexual pleasure upon the female.
Like a normal blowjob, but from a girl with a tracheotomy (hole in neck to breathe through, generally as a result of cancer) so you can sit your nutsaq in the hole (so she can suck on it) as well as getting head. Be careful not to block it too much, in case she vapour locks.
Eric: Yo sonn, Daniel was totally giving Maria a Neck Job in the parkyesterday.
Liz: Really?
Eric: Amazing thing is she had no hickeys to prove it.
Liz: Wow He must be really good.