Bait: using a small treat, toy, or other rewarding object to gain a dog’s attention.
Benched show: an all-breed show designed for public education and enjoyment.  All the dogs in a benched show are required to stay in an assigned benching area for the show’s duration.
Brace: two dogs of the same breed, owned by the same owner, being shown in a conformation competition together as a pair, in order to display the breeder’s consistency in his or her breeding program.
Finish: a term used in conformation competition that means the dog won enough points to be awarded a champion title.
Gait: The most efficient way of moving for a particular dog, usually a trot or jog.
Loin: The area between the dog’s last rib and the beginning of his pelvis - what we call a waist on people.
Occiput: A bony, domed part of the dog’s skull that’s located at the back top.
Pastern: The area between the dog’s paws and his lower arm.
Patella: The knee joint of a dog’s rear legs.
Stack: To make a dog stand in a way that best displays his physical virtues.
Stop: The area on a dog’s skull between the back of the muzzle and the beginning of the top skull.
Topline: The spinal section of the dog from his shoulder blades to the base of his tail.
Withers: The point where the shoulder blades meet.
Whelp: To give birth to a litter of puppies.

From Dog Fancy magazine