dark hot pot; mystery stew
A party game where each person brings a hidden ingredient to add to a communal pot, then the stew is eaten in the dark so no one knows what they are eating. Often associated with fun and surprise.
See also: 闇汁
At the year-end party we did a dark hot pot, and someone put in chocolate, making it taste awful.
Dark hot pot is fun precisely because you eat it in the dark.
Compound of 闇 (yami, 'darkness') and 鍋 (nabe, 'pot'). The name reflects the practice of eating the stew in the dark so that the ingredients remain a mystery.