Investigate the origins and first appearance of Sheldon Cooper's catchphrase 'Bazinga!' on The Big Bang Theory Wiki. Identify the episode and season where it was first uttered, and list any notable variations or explanations of the phrase provided on the wiki page. Also, find out if the phrase has an origin in real life.
Navigate to bigbangtheory.fandom.com. Search for 'Bazinga!' on the wiki. Locate the section detailing the first appearance of the phrase, including the episode and season. Identify and list any variations or explanations of the phrase provided on the page. Search for information regarding the real-life origin or inspiration of 'Bazinga!'. Synthesize the gathered information into a concise answer.
State the episode and season where 'Bazinga!' was first uttered. List any notable variations of the phrase (e.g., 'Bazinga, Penny!'). Provide any in-universe or real-life explanations for the phrase's meaning or origin as described on the wiki. Confirm whether the phrase has a real-life origin according to the wiki.