Bilious

The name 'Bilious' is not typically used as a given name for humans. Its origin is rooted in the Latin word 'bilis', meaning 'bile'. In ancient and medieval medicine, bile was one of the four humors believed to determine a person's temperament and health. An excess of black bile was thought to cause melancholy, while an excess of yellow bile (choler) was associated with an irritable or angry disposition.

The adjective 'bilious' entered the English language to describe someone afflicted by an excess of bile, leading to symptoms like indigestion, nausea, and a jaundiced appearance, or more commonly, a bad temper. Its usage as a descriptive term for a character in literature, particularly to denote an unpleasant or sickly disposition, is more common than its use as a personal name. It gained some notoriety as a character name in the 'Discworld' series by Terry Pratchett, where Bilious, the 'Oh God of Hangovers', embodies these characteristics.