I never considered myself a humorous person, but I think that this joke that came to my mind isn't so bad after all:
What do you call a SAD GATSBY?
If you don't get this, here is the explanation:
The Great Gatsby's main character is sad when his lover Daisy is not around. So sad Gatsby would lack a Daisy, thus "lackadaisical."
Jin Woo Won
An undergrad at Columbia University, studying Computer Science and in particular artificial intelligence.