marijuana definition what it do
Definition. Marijuana is a green or gray mixture of dried, shredded flowers and leaves of the hemp plant Cannabis sativa. Before the 1960s, many Americans had never heard of marijuana, but today it is a widely used illegal drug. It is usually smoked as a cigarette (called a joint or a nail) or in a pipe or bong.he effects of marijuana on each person depend on the type of cannabis and how much THC it contains; the way the drug is taken (by smoking or eating); the experience and expectations of the user; the setting where the drug is used; and whether alcohol or other drugs are also being used.