Demi-monde is a French term that refers to a social group or class that is on the fringes of respectable society. The word is often synonymous with the phrase "underbelly of society" and is associated with individuals who lead unconventional lifestyles. Synonyms for demi-monde include "subculture," "seedy society," "deviant class," and "outcast group." This group of people is often characterized by their lack of conformity to traditional social norms, including sexual conduct, drug use, and criminal activity. Despite their marginalized position, many members of the demi-monde have played important roles in cultural or artistic movements throughout history.