A trend which involves making cakes and other food rainbow coloured, as in the colour schemes often associated with these mythical one-horned creatures. Take a quick search on Instagram or Pinterest, and you will see a frenzy of people probably old enough to know better liberally spreading food dyes, sprinkles, tiny marshmallows and edible glitter everywhere. All over their food. This is the sort of trend that catches on in Japan, but normally gets repelled at the border. Sadly, this one has gone global.