"the customer was not very impressed by the concrete pizza on his porch, and was even less impressed when we sealed it with tomatoes and onions
a concrete pizza occurs when plant matter such as grass and leaves finds its way or is placed onto a concrete or cement surface before it dries
""the customer was not very impressed by the concrete pizza on his porch, and was even less impressed when we sealed it with tomatoes and onions" What is the definition of "concrete pizza"?