Lamborghinis are luxury sports cars that are manufactured in Italy. According to the Rap Genius
site, Fiasco uses the term "Lamborghini angels" to say we admire a culture that is materialistic. In the same way that God whom we admire needs his angels, the rich we admire need their Lamborghinis. In addition, the way their doors go up and down look like flapping wings, like an angel would have. Rap Genius states the explanation has been verified by Fiasco.