A fourgy is an orgy that includes four people. The word is a combination of the words four and orgy.
More About Fourgy
The term fourgy is used to indicate the number of people involved in the orgy. Group sex involving three or more people can be referred to as an orgy. So, the word 'orgy' can be nondescript when it comes to the number of people involved. Adding a prefix indicating the number of people involved can be an easy way to provide details of group sex in a subtle way.
