Slang phrase nigger within the woodpile "a hid motive or mysterious component influencing a problem within an adverse way" [OED 1989] is attested by 1800; Thornton's "American Glossary" (1912) defines it as "A method of accounting for that disappearance of gas," that's why "an unsolved thriller.The slang term "Niga" is often a very offensive term w