Poisonous : (of a substance or plant) causing or capable of causing death or illness if taken into the body. Unlawful : not conforming to, permitted by, or recognized by law or rules. Intoxicating : (of alcoholic drink or a drug) liable to cause someone to lose control of their faculties or behaviour. Cheap : low in price, especially in relation to similar items or services. Illicit : forbidden by law, rules, or custom.