An Oklahoma Eighth is slang for 1.75 grams of marijuana and 1.75 grams of cocaine mixed together in the same bag. Together the total weight amounts to 3.5 grams, which is an eighth of an ounce.
Oklahoma eighths got their name from the world famous Oklahoma Snow Blow that the state of Oklahoma is known for. These types of mixed bags are frequently sold by dispensaries where Snow Blow and Weed can be found. According to Oklahoma legend, the first Oklahoma Eighth was created in 1874 by Chief SniffemGeekum of the QuaPaw nation.
Chief SniffumGeekum: Oklahoma Snow Blow. Blow Big Gas From Oklahoma Eighth. Big Geekin'. Geek fast, like the wind.