About T-Shirt Design
The joke on Jolly AF T-Shirt is easy to understand, and that is a big part of why it works. Fans of everyday humor will probably get the joke first, but it is simple enough for almost anyone to understand.
You could wear it for casual days, bring it out for birthdays, or just keep it in the normal shirt rotation. It works well as a novelty t shirt because the joke is clear and the design has plenty of personality. This one is mostly about having a little fun with what you wear, which is kind of the point.