The crossword solutions for the term BOSS, SLANGILY are CHEESE and MRBIG. The term 'CHEESE' is a slang term used to refer to someone in a position of authority, such as a boss. It is thought to have originated in the early 20th century, when it was used to describe someone who was overly proud or boastful. The term 'MrBig' is also a slang term used to refer to someone in a position of authority, such as a boss. It is thought to have originated in the late 20th century, when it was used to describe someone who was powerful and influential.