If rap is urban poetry, this is urban music. Free virtuoso public percussion performance of one man, his skillz, and a dozen upturned garbage cans, old pots, traffic cones and shopping carts. Be generous; even though there's low overhead, he is still a street person.

Note bene: the term refers more to the style than to the actual means of production, but this is still undoubtedly its coolest incarnation.

Witnessed in Washington, DC.

Also, the nickname for the character Estragon in Samuel Beckett's play Waiting for Godot.