Bos (from Latin bōs: cow, ox, bull) is the genus of wild and domestic cattle. What does BOS mean? BOS is a common shortening of the city of Boston, Massachusetts and an internet acronym, often standing for boyfriend or boss over. Looking for online definition of BOS or what BOS stands for? BOS is listed in the World's largest and most authoritative dictionary database of abbreviations and. An abbreviation for Bitch Owning Shawty. What does BOS stand for? What does BOS mean? This page is about the various possible meanings of the acronym, abbreviation, shorthand or slang term: BOS.