"'Fat Lip'" is a 2001 punk rock song by the Canadian pop punk band Sum 41 and is the first single from their debut studio album "All Killer, No Filler", which was released in 2001. The song was written by Raine Maida and was produced by both Arnold Lanni and Raine Maida. Fat Lip has been featured in several movies and video games, such as EA Sports' NHL 2002, American Pie 2, Guitar Hero, GuitarFreaks V4, DrumMania V4 and Guitar Hero 5 (downloadable track) and Smallville. The band has also performed Fat Lip on Saturday Night Live. The music video was ranked as #75 on "MuchMusic's 100 Best Videos".