Alan Sokal's exposure of the FashionableNonsense of (some) PostModernists by having a spoof essay, "Transgressing the Boundaries: Toward a Transformative Hermeneutics of Quantum Gravity", published in Social Text in 1996.
His hoax was so notorious that a book (ISBN 0803279957 ) was written about its ramifications - see http://bookshelved.org/cgi-bin/wiki.pl?TheSokalHoax.
Alan Sokal is Professor of Physics at New York University.