While falernum is a general term for a sweetly spiced syrup often made with clove, almond, ginger, lime zest, and vanilla or allspice, Velvet Falernum is the boozy Barbadian version you'll see behind many a bar. The low-proof rum base is infused with most of the above and is often used as the sweetening agent in Caribbean cocktails - an essential in mai tais and zombies. Go ahead, say it in your Rihanna voice.