No.
Chat with our AI personalities
One of the band members had brothers that would fight all the time. The brother named Jimmy would always win. So the other brother drew a picture of Jimmy eating the world. Under the picture is said: "Jimmy eat world" and that's how "Jimmy eat world" got their band name.
Nope, just a realistic picture on cardboard.
Buffets
From the picture I found, their names are Kellie and Katie
Jimmy Peakes was most likely played by an extra and not given a character name as his name is unknown.