One who spends all or the majority of his or her free time in a Gym a.k.a. work out facility to impress total strangers.
One who is always lifting weights, running, swimming, etc..etc..anything in hopes of their body reaching total perfection by their own standards. In most cases they will never believe their body is perfect which is why they spend so much time performing these acts.
Bob: Where's Micheal? He was suppose to be here an hour ago.
Jeff: Where do you think he's at? He's a vetter.
A 'vette (Corvette) owner.
Face Man is a vetter.