Slang phrase nigger during the woodpile "a hid motive or not known aspect affecting a scenario in an adverse way" [OED 1989] is attested by 1800; Thornton's "American Glossary" (1912) defines it as "A mode of accounting for the disappearance of gasoline," hence "an unsolved secret.The slang time period "Niga" can be a extremely offensive term which