What is geek stink breath?

Geek Stink Breath is a song from the American punk rock band Green Day. It was released as the second single from their fourth studio album, Insomniac, in 1995. The song was written by the band's lead vocalist and guitarist, Billie Joe Armstrong, and is known for its aggressive guitar riffs and fast-paced drum beats. The lyrics of the song revolve around the experience of someone suffering from bad breath, or halitosis, and the embarrassment and shame that can come with it. Despite its humorous subject matter, Geek Stink Breath has become a fan favorite and a staple of Green Day's live performances.