Perhaps something from Dotty in "Jumpers" or one of the female characters in "Arcadia" or "The Real Thing" (sorry not to be more specific, but, I'm drawing a blank at the moment -- Stoppard's best monologues are for his male characters).
"What a story........ everything but the bloodhounds snappin' at her rear end." -- Birdie
[http://margochanning.broadwayworld.com/]
"The Devil Be Hittin' Me" -- Whitney