Slang terms in the drug world change constantly. Old terms drop out of the language and new ones take their place as various drugs fall in and out of use. Slang also reflects changes in the groups who sell and use drugs—their geographical location, their ethnicity, and their social status. Yet certain terms last for a remarkably long time, such as some of those for heroin. Other drug-related terms have become a permanent part of the English language, such as "hooked," "spaced out," "high," and "hip." The words listed below have been in use over the last hundred years. Some developed recently. Also included are the origins of these words, if known.