THCP, which is short for tetrahydrocannabiphorol and scientifically known as (-)-Trans-Δ9- tetrahydrocannabiphorol, is a natural cannabinoid and analog of THC present in varieties of cannabis. It’s thought to be 33 times more active at cannabinoid 1 (CB1) receptors than THC, causing an intense and intoxicating euphoric high.