Synthetic cannabis (synthetic marijuana), or technically synthetic cannabinoid receptor agonists are designer drugs that mimic the effects of cannabis sprayed onto a herbal base material. There are several psychoactive artificial cannabinoid families (e.g. AM-xxx, HU-xxx, JWH-xxx, CP xx) that are used as designer drugs sprayed on herbs and sold as natural highs under brand names like K2 and Spice, both of which are genericized trademarks used for any synthetic cannabis product. Synthetic cannabis is often termed spice product.