What is an idiom in this song gangsta's paradise?

In "Gangsta's Paradise," an idiom present is "living in a gangsta's paradise," which conveys the idea of existing in a life filled with crime, danger, and moral ambiguity. This phrase captures the struggle and complexities of a lifestyle often glamorized in hip-hop culture, while also highlighting the negative consequences that accompany it. The use of "paradise" ironically suggests that, despite outward appearances, this existence is fraught with turmoil and despair.