Bartholomew JoJo "Bart" Simpson (born February 23 or April 1, 1980), is the tritagonist of The Simpsons. He is the mischievous, rebellious, misunderstood and "potentially dangerous" eldest child of Homer and Marge Simpson, and the older brother of Lisa and Maggie. He also has been nicknamed "Cosmo", after discovering a comet in "Bart's Comet". Bart's also been on the cover on numerous comics, such as "Critical Hit", "Simpsons Treasure Trove #11" and "Winter Wingding". Bart also has a whole 100-issue comic series known as the Simpson Comics Presents Bart Simpson. Bart is loosely based on Matt Groening and his older brother, Mark.

Even at a young age Bart has accomplished many feats. He has won an award for his Angry Dad web series, he has discovered a new comet which was named after himself, and he also has perfomed in a successful band with Milhouse Van Houten, Nelson Muntz and Ralph Wiggum.

Biography
Young Bart
Young Bart

Bart was born on February 23 or April 1. Bart is a self-proclaimed underachiever and prankster who is constantly in detention. He is easily distracted. His penchant for shocking people began before he was born: Bart "mooned" Dr. Hibbert while he performed a sonogram on Marge when she was pregnant with him, and moments after being born, he set Homer's tie on fire (Marge saying that he could not have done it on purpose because he was only ten minutes old). Bart's first words were "Ay Caramba".

Bart's interests include Krusty the Clown (he is "Krusty Buddy" number 16302), reading comic books (especially Radioactive Man), watching TV (especially The Krusty the Clown Show and The Itchy & Scratchy Show), terrorizing Lisa, playing video games, helping Lisa solve various problems (e.g. reuniting Krusty with his estranged Father), and pulling off various pranks, (such as mooning unsuspecting people, prank calling Moe at his tavern, and his patented spitting off an overpass). Bart also sprays graffiti under the alias 'El Barto', and regularly frequents the Kwik-E-Mart (for bubble gum and Squishees) and The Android's Dungeon. Yuma Hickman moved to Springfield when Marge was pregnant with Bart.

Bart hinted that his favorite movies are Jaws and the Star Wars trilogy. His best friend is Milhouse Van Houten.

Bart is the most misunderstood of the family (After Maggie, who currently can only speak a few words), constantly frustrated by the narrow-minded people of Springfield, who judge him merely by his thoughts and actions.