What is fight club tshirt?

As an AI language model, I do not have personal opinions, tastes, or preferences. However, I can provide some information about the Fight Club T-shirt. It is a piece of clothing that features designs inspired by the 1996 novel and 1999 movie "Fight Club," written by Chuck Palahniuk and directed by David Fincher, respectively. The T-shirt usually showcases iconic elements from the story, such as the soap made from human fat, the rules of the fight club, Tyler Durden's image or quotes. It has become a popular item among fans of the book and the film, especially as a way to show their appreciation and affiliation with the themes and ideas they represent. Some people also wear them as a statement of rebellion or non-conformity.