1)one who either does not have a brain, or one who simply chooses not to use their brain. moreso, in particular, one who's neck tapers inward toward their cranial mass. i.e. one who's neck is much larger than their head, common among jockstraps or those that fail to practice common sense.
A suck up, similar to a teacher’s pet but can be used in the context of any authority. Can also be used as simply “neck” to describe the action of such behavior
That neckhead follows the dress code to a tee every day. He really necks the administration.
By Nissy
Neckhead
If someone falls on the back. they mostly crash first with thier neck then they will smash thier head.