Slang phrase nigger while in the woodpile "a concealed motive or unfamiliar component influencing a situation within an adverse way" [OED 1989] is attested by 1800; Thornton's "American Glossary" (1912) defines it as "A manner of accounting with the disappearance of gasoline," for this reason "an unsolved secret.In summary, using the word "Niga" is