MUMPS ("Massachusetts General Hospital Utility Multi-Programming System"), or M, is a high performance transaction processing key–value database with integrated programming language. It was originally developed at Massachusetts General Hospital for managing hospital laboratory information systems.

Why is it called mumps?

The word "mumps" is first attested circa 1600 and is the plural form of "mump", meaning "grimace", originally a verb meaning "to whine or mutter like a beggar".

Whats mumps means?

: an acute contagious virus disease caused by a paramyxovirus (species Mumps virus of the genus Rubulavirus) and marked by fever and by swelling especially of the parotid gland.