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A derogatory term for a homosexual. Originates from Brussels street slang, circa 1990. Similar to "playing the flesh flute", this term descibes crude acts involving urine, male genitalia, and musical techique.

Suspecting homosexuality wherever he goes and gay bashing at every opportunity, Andrew acts like a self-loathing pystpiper.
by Martin Downs May 19, 2006
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