Sentence:  ‘Those "clochards" in Cannes, mostly old <WSD>soixante-huitards</WSD>. They see a tribute to modern industrial genius and can't resist giving it a swift kick.' 
Meaning of the word marked with <WSD> tags:  Someone who took part in, or otherwise supported, the civil unrest in France in May 1968, characterised by student protests and widespread strikes.