Slang phrase nigger inside the woodpile "a concealed motive or unfamiliar issue impacting a circumstance 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 fuel," hence "an unsolved mystery.In conclusion, the usage of the term "Niga" is rarely accepta