Gas Whistle
The technique of being able to not only control the release of natural gas, but to also adjust the pitch and tone of the following sounds as they are delivered; turning the human sphincter into a playable instrument.
After spending the evening in his local pub, Steve returned home and said to Portia "The lads told me tonight that my farts are so good that I'd play a mean Gas Whistle; my first rehearsal with their band is next Tuesday. How about that?"