noun. A teeny-weeny, tiny-whiny, domesticated canine, probably belonging to Paris Hilton. Also: purse-dog.
Real citation: “Before we tear our hair out staring at this horrifying tableaux submitted by an alert, camera-wielding reader, we're moved to pity the skittish accessory-dog fleeing in horror from the two fluffy monsters chasing it up Melrose.”
(“Mukluks on Melrose,” Defamer, Oct. 8, 2004, http://www.defamer.com/topic/mukluks-on-melrose-023012.php)
Made-up citation: “Man, my biological clock is ticking for a dog. I need a pooch soon, and I may not have room for a big dog, but I’ll claw my eyeballs out before I get a yippy, yappy, goddamn accessory-dog."