Armatage Shanks by Green Day is a song that captures feelings of existential angst and disillusionment. The song delves into themes of self-identity, frustration, and the struggles of fitting into societal norms. Throughout the track, lead singer Billie Joe Armstrong's lyrics express a sense of alienation and dissatisfaction. A particularly poignant moment is the line 'I'm a mutt,' which showcases the protagonist's internal conflict and sense of not belonging. The song is emblematic of the mid-90s punk rock era, reflecting a rebellious attitude and a search for personal meaning in a conformist world.