It's only logical that you should enjoy a good catchphrase! Every time you wear this officially licensed, 100% cotton t-shirt, you'll be imbued with the calculating intellect and sexual magnetism of Sheldon Cooper from "The Big Bang Theory." We're not sure how it works, but it's probably scientific. Why bother with other shirts that aren't as awesome as this? Announce your nefarious deeds the way all the coolest geeks do, with a t-shirt! BAZINGA! Black 100% Cotton Officially Licensed Standard Fit More 'The Big Bang Theory' items: The Big Bang Theory Merchandise Size chart