A philanthropist was someone who performs personal acts for the benefit of others, or the public at large. This often involves the giving of significant amounts of money or labor.
In 2372, FCA Liquidator Brunt accused Quark of being a philanthropist due to the manner in which he conducted business activities at his bar. He used the term disparaginly, as such activity is frowned upon by Ferengi society. (DS9: "Body Parts")