It is called a "nape" piercing
Yes...that is only if you are are planning on piercing as a career.
Veterinarians
It's simply a nape piercing
A nonsense name for another non existent piercing or misnamed piercing.
Sorry no such piercing, just another made up name.
Chest piercing is known as Sternum piercings. This is a type of body modification. Basically, it involves piercing the skin over your sternum, also known as your breastbone. A sternum piercing can be a unique way to change your appearance, but you need to take care of the piercing so it doesn't get infected.
Physician
Any job that deals with detail.
There is no such piercing, some one has given you the wrong name, besides that piercing don't have meanings they are simply piercings nothing more.
The piercing that is located above the chin is a Labret* ( *Latin for lip ) however there are various other piercings in the area of the mouth, that were also called a Labret piercing or Lip piercing.
labret