sixieEtymologyFrom six + -ie, in reference to their six years until graduation.sixie means A seventh-grader at Boston Latin School. Lexicurio rates it Sui generis — a strength score of 95 out of 100.nounA seventh-grader at Boston Latin School.“Elena went on to Boston Latin alone, and Genette got into a crowd in her middle school. Even though Elena was in seventh grade, at Boston Latin she was called a sixie, and they were the bottom of the heap.”