Grant Barrett (born 1970) is an American lexicographer, specializing in slang, jargon and new usage. He is also co-host and co-producer of the nationwide public radio show A Way With Words, author of Perfect English Grammar (Zephyros Press, 2016, ), and editor of the Official Dictionary of Unofficial English (McGraw-Hill, 2006, ), the Oxford Dictionary of American Political Slang (Oxford University Press, 2004, ), and the award-winning web site Double-Tongued Dictionary. He is also the vice president of communications and technology for the American Dialect Society, a former member of the editorial review board for the academic journal American Speech, former editor of the journal's "Among the New Words" column, and a founder of the online dictionary Wordnik.