It's a blend between poetry, music and prose but I consider it to be poetry more than music.
I started a poetry battle, and the person used rap. It really pissed me off. Either way though, its more aligned with poetry.
Ew. Most modern rap is garbage. I find it to be disgusting to liken it to poetry. Please see my profile for further details. I acknowledge that not all rap is bad and that some of it is very poetic. But ... I just can't bring myself to push that "yes" button. *shudders* Sorry guys.