Salon des Refusés is generally known as an exhibition of works rejected by the jury of the official Paris Salon, but the term is most famously used to refer to the Salon des Refusés of 1863.
Today by extension, salon des refusés refers to any exhibition of works rejected from a juried art show.
Among the exhibitors were Paul Cézanne, Camille Pissarro, Armand Guillaumin, Johan Jongkind, Henri Fantin-Latour, James Whistler and Édouard Manet, who exhibited his famous painting "Le Déjeuner sur l’herbe", officially regarded as a scandalous affront to taste.
Édouard Manet | Le Déjeuner sur l'herbe, 1863 | Musée d'Orsay, Paris