Great for Big Bang officiandoes,
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This review is from: Coole-Fun-T-Shirts Men's Slim-Fit T-shirt Penny Knock Knock Big Bang Theory Vintage-Style (Sports Apparel)
Excellent quality and service. This is one of those tee-shirts which singles out those in the know from those not - you can tell from the response to the image - you'll either get a big, knowing smile or a look of complete bewilderment. Tee-hee.