Sansculottes (i.e. fellows without breeches), a name of contempt applied by the aristocratic party in France to the Revolutionists, and at length accepted by the latter as a term of honour, as men who asserted their claim to regard on their naked manhood.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Sans Souci * Sansculottism