Some word historians say that nitty-gritty refers to the debris – or remains -- left on the floor of slave ships. This reference may make the word offensive to some people.________________________________British word experts have also researched the origins of "nitty gritty." Word historians on the British website The Phrase Finder say that nitty-gritty first appeared in 1937 as a musical composition. The song 'That Nitty Gritty Dance' was copyrighted by Arthur Harrington Gibbs.一些单词历史学家说这个词指的是贩奴船上的碎片.这样的出处分析可能会冒犯一些人.______________________________英国单词学家也探究过这个词的起源.他们在英国网站"The Phrase Finder"上说,这个词在1937年第一次出现在一个音乐作品之中.这首歌的版权归亚瑟`哈灵顿`吉布斯所有.