A vessel, typically made of stone, occasionally of hammered bronze, used to capture male ejaculate. Cumbuckets are commonly found in Mesopotamia, or present-day Iraq.
Thousands of years ago men would gather round communal combuckets and engage in a circle jerk as part of a religious ceremony. Once a bucket was filled with male ejaculate a female virgin would be drowned in it, and then consumed in a celebratory feast.
This practice has begun to fade in recent years, and cumbuckets have all but disappeared outside of college fraternities.