The revolutionary act of taking a sneaky dump in the middle of a tennis court late at night. Made popular by Anthony Hopkins in Swansea, 1992.
Anthony Hopkins: "I played a superb singles game of 'Les Dennis' last night on centre court."

Jodie Foster: "Is that your British rhyming slang for 'shennis'?"

Hopkins: "Yeah it is! It's exciting"

Foster: "Yeah I LOVE shennis!"
by noamshouseparty July 7, 2009
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