Designating a play or other performance acted by the person or people also responsible for writing, staging, or directing it.

Of a work of art, form of entertainment, etc.: involving or portraying one or more naked or scantily clad people; performed without clothing. Also…

Designating or relating to a type of (often noisy or bawdy) entertainment traditionally associated with summer shows on piers in seaside resorts.

In early use: that performs on a showboat. Later: characterized by or given to performing or showing off, esp. in public; flamboyant, exhibitionist.