Idiom be the biz (definition of biz from the cambridge advanced learner's dictionary & thesaurus © cambridge university press) See examples of biz used in a sentence. From longman dictionary of contemporary english related topics:
How to use biz in a sentence. Theatre, business biz /bɪz/ noun [singular] informal a particular type of business, especially one relating to entertainment. The meaning of biz is business.
American heritage® dictionary of the english language, fifth edition. Biz is sometimes used to refer to the entertainment business, especially pop music or films. The term “biz” is an informal abbreviation of the word “business.” it is commonly used in casual conversation to refer to various aspects of business, industry, or a specific occupation.