Vaudeville shtick is a type of comedic performance that was popular in the late 19th and early 20th centuries. It typically involves a series of short, unrelated acts such as singing, dancing, and comedy sketches. The term 'OLIO' is used to refer to a variety of these acts, which are often performed together in a single show. OLIO is derived from the Italian word for 'MIXTURE, ' and it is used to describe a collection of diverse acts.