If there’s one defining character trait of Batman, it’s his constant seriousness. They don’t call him the Dark Knight for his sunny disposition. Bruce Wayne is not the type to crack jokes and tickle ribs - he’s not even the type to smile regularly. His worst enemy’s catchphrase is “Why so serious?” In other words, Batman doesn’t seem to have much of a sense of humor. However, even the toughest superheroes can still be funny from time to time (and there are plenty of jokes about Batman).
Bruce Wayne may not make a habit of joking around, but he’s one of the smartest individuals in all of comic fiction. So, it’s no surprise he knows how to deliver a quip when the situation calls for it. In between his epic clashes with the Joker and saving Gotham City, there have been several rare times Batman was funny. It’s the kind of thing you have to see to believe.