It says "drug addict / stat addict".
Why it is funny: because there is this troubling similarity between the design of a whiskers box used everywhere in statistics and a syringe, hence the addiction theme. Some people wonder about the red dots outside the whisker: those points exceed 1.5 times the interquartile range, counting from the 3rd quartile (end of the rectangular box). So they do are legitimate, but whatever, you can scratch them off.
This is one the most popular in the store.
This T-shirt is made with 100% coton, ringspun technology. It has an exceptionnaly high thickness, making it both robust and pleasant to wear. The design is manually head-transfered to the fabric via the flex technology. This T-shirt can be washed inside-out at 40°C. No tumble dryer. If you damage the printed layer by accident (or tumble dryer), iron it through a parchment paper to smooth it again.