noun

• An English surname transferred from the given name.
• Richard Nixon, 37th President of the United States of America
• A township in DeWitt County, Illinois, United States, named after early settlers George, William and Morris Nixon.
• A census-designated place in Washoe County, Nevada, United States, named in honor of George S. Nixon, Nevada senator.
• (slang, narcotics) A drug of low quality and low potency passed off as a powerful, pure drug.