How did Fall Out Boy get their name?

The band's first public performance came in a cafeteria at DePaul University alongside Stilwell and another group that performed Black Sabbath in its entirety. Wentz and Stump argued over band names; the former favored verbose, tongue-in-cheek names while the latter desired to reference Tom Waits in name. After creating a short list of names that included "Fall Out Boy," a fictional character from The Simpsons and Bongo Comics, friends voted on the name.

The band's second performance, at a southern Illinois university with The Killing Tree, began with Wentz introducing the band under a name Stump recalled as "very long." According to Stump, an audience member yelled out, "Fuck that, no, you're Fall Out Boy!," and the band were credited later in the show under that name by Killing Tree frontman Tim McIlrath. As the group looked up to McIlrath, and Trohman and Stump were "die-hard" Simpsons fans, the name stuck.