Big Bang Theory Bazinga Junior Pajama Set Add some pizzazz to your bedtime outerwear with this colorful Big Bang Theory pajama set! The junior-sized Big Bang Theory Bazinga Junior Pajama Set includes a white baby tee with a red neck ringer and red pants with a drawstring waist. The word Bazinga! which is Sheldon's favorite phrase on the TV series The Big Bang Theory , is on the front of the baby tee in red and repeated all over the pants in yellow. The pants also feature several icons from the show, including the atomic symbol, a spaceship, a satellite and a lab beaker.