The crossword solutions for the term 'Important Person, in Slang' are Biggie and CHEESE. Biggie is a slang term used to refer to an important or influential person, usually someone who is well-known or respected. The term originates from the late rapper Notorious B.I.G., whose stage name was Biggie Smalls. CHEESE is another slang term used to refer to an important or influential person, usually someone who is wealthy or powerful. The term is derived from the phrase 'BIG CHEESE, ' which is used to describe someone who is in a position of power or authority.