Something that one should not take too seriously
To dream that you are telling a joke, suggests that you are not being taken seriously and as a result you are feeling frustrated. On the other hand, you may not be taking an issue seriously.
To hear a joke in your dream, signifies that you are doing something pointless. It may also mean a release from tension that had been bothering you. Also see “Practical Joke.”
Dreams of a joke that makes you laugh is a sign of genius, intelligence, joy, and that you have a great sense of humor.