The Joker has several nicknames for Harley Quinn, some of which are endearing while others may be insulting. The most well-known nickname that the Joker calls Harley Quinn is "puddin". This is a term of endearment that he often uses when he is trying to get her to do something for him, or when he is trying to convince her to come back to him after they have had a falling out. Other nicknames that the Joker has used for Harley Quinn include "Baby Doll", "Crazy Bitch", "Queen of Hearts", "Harl", "Harley-girl", "Pumpkin Pie", "Pooh", "Darlin", "Idiot", "Crybaby", and "Moron". Harley Quinn, on the other hand, often calls the Joker "Mr. J".