11 Geeky Facts About The Big Bang Theory You Didn't Know

9. 'Bazinga!'

Sheldon's popular catchphrase, 'bazinga', made it's first appearance in Season 2's finale 'The Monopolar Expedition', and has been a staple of the show ever since. However, in terms of its creation, it appears to have been something of a happy accident. 'Bazinga' was actually an in-joke among the show's writers that became so popular among them and the crew that they decided to incorporate it into the show. Writer and resident prankster Stephen Engel is said to have invented the term by uttering it every time he played a joke on another member of the writing team. Thus, 'bazinga' was added to the script in a last-minute decision during a producer's meeting directly before 'The Monopolar Expedition's taping. Jim Parsons says of his character's celebrated catch phrase: "I knew what it meant the moment they said it. It's like 'gotcha", you know, it's just in that energy. There's just something about it. I like it because it's not plain English in a lot of ways and that's very handy."