Of course, it goes without saying, but the following contains major spoilers for Joker: Folie à Deux. Turn back now if you're not up to date! For everyone else, put on a happy face and get reading.

Jack's dead, my friend. You can call me Joker." "Gotham City—it always brings a smile to my face. “Losing is a bad habit.” “Remember, put on a happy face!” “I've given a name to my ...