Iggy Azalea and Mike Posner set off sparks on their steamy new collaboration “Flash” off Iggy’s upcoming EP Glory, which drops Sunday.

“It’s like sexy ratchet. I define sexy ratchet. The beat is so R&B and just smooth, and you know Mike with his voice. It’s smooth, but the lyrics are ratchet—way worse than ‘Pu$$y’—way worse. It makes ‘Pu$$y’ look very PG,” the Aussie rapper told Fuse, referring to her Ignorant Art mixtape single.