A noun usually referring to a cute little pudgy baby or toddler. Can be used for older people but is not very common.
Cheeky meaning impertinent, but in this case: delightfully sassy as some children are.
Chops referring to their cheeks or mouth area.
Person1: Isn't the baby so cute!
Person2: Yes, she's such a little cheeky chops!
*Baby crawls away*
Person1: Oy, cheeky chops, where are you off to?
Toddler: Did you bring me a present, Aunty B?
Person: Aren't you a little cheeky chops!