Drinkers Masses, to include Gamblers Masses (Latin: Missa Potatorum, Officium Lusorum), was a genre of medieval Latin poetry which parodied the Roman Catholic Latin Mass in order to make fun of drinking and gambling monks and clerics. These masses were written between about 1100 and 1700 by clerici vagantes (wandering clerics), with the first example being the gamblers mass (officium lusorum), found in the Carmina Burana. The genre is somewhat related to other medieval ecclesiastic parody, such as the Feast of Fools and the Feast of the Ass.