Marijuana — also called weed, herb, pot, grass, bud, ganja, Mary Jane, and a host of other street terms — is a gray-green mix of dried, crushed leaves and flowers of cannabis sativa , the hemp plant. Some people smoke marijuana in rolled cigarettes called joints ; many use pipes, hookahs (sometimes called bongs), or marijuana cigars called blunts (which are usually assembled by cutting a cigar lengthwise and replacing all or part of the tobacco with marijuana). 1 Marijuana can also be used to make tea and, especially when sold or consumed for medicinal purposes, it is often mixed in (edible) foods such asbrownies , cookies, or candy. The most potent forms of marijuana include sinsemilla (from female special care plants) and concentrated resins that contain high doses of marijuana’s active ingredients, such as honey-like hash oil, soft, waxy budder, and the firm , amber-looking shatter . These resins are increasingly popular with those who consume them for recreational or medical purposes.
The main psychoactive (i.e. mind-altering) substance in marijuana, which is responsible for most of the heady effects people seek, is delta-9-tetrahydrocannabinol (THC). This substance is found in the resin produced by leaves and buds, mainly from the female cannabis plant. The plant also contains more than 500 chemicals, including more than 100 compounds that are chemically related to THC and are known as cannabinoids.