Okay, so amiir nelson — who even is this guy, and why is everyone suddenly talking about him like he’s the last slice of pizza at a party? I’ve been scratching my head, googling furiously, and even asking my barista if she’s heard of him (spoiler: she has). Let me tell y’all what I’ve gathered, because this dude is more than just a name lighting up your Instagram feed. So, Who Is Amiir Nelson, Really? I mean, where do I…