(orgies)
1.
An ~ is a party in which people behave in a very uncontrolled way, especially one involving sexual activity.
...a drunken ~.
N-COUNT
2.
You can refer to an activity as an ~ of that activity to emphasize that it is done to an excessive extent.
One eye-witness said the rioters were engaged in an ~ of destruction...
N-COUNT: with supp, usu N of n emphasis