Word Origin & History
"awkward or boorish man," 1812, nautical, "raw recruit, green hand," originally a sailor's contemptuous word for soldiers or marines, of uncertain origin. "Dictionary of American Slang" proposes galut, Sierra Leone creole form of Sp. galeoto "galley slave." Perhaps rather Du. slang kloot "testicle,"
klootzak "scrotum," used figuratively as an insult.