What is weed?

The term 'marijuana' refers to the leaves and flowering tops of the cannabis plant. Marijuana is a tobaccolike substance produced by drying the leaves and flowering tops of the cannabis plant. Marijuana contains a natural chemical called THC (delta-9-tetrahydrocannabinol) which gives users of the drug a 'high' when smoked. Marijuana leaves are usually smoked in the form of loosely rolled cigarettes called joints or cigars called blunts.