8 Words That Are Older Than You Think
1918, altered by influence of Spanish proper name Maria Juana "Mary Jane" from mariguan (1894), from Mexican Spanish marihuana, of uncertain origin.
Marijuana ... makes you sensitive. Courtesy has a great deal to do with being sensitive. Unfortunately marijuana makes you the kind of sensitive where you insist on everyone listening to the drum solo in Iron Butterfly's 'In-a-Gadda-Da-Vida' fifty or sixty times. [P.J. O'Rourke, "Modern Manners," 1983]
marijuana mar·i·jua·na or mar·i·hua·na (mār'ə-wä'nə)
The cannabis plant.
A preparation made from the dried flower clusters and leaves of the cannabis plant, usually smoked or eaten to induce euphoria.