potlache

noun2

1. •
   A ceremony amongst certain indigenous peoples of the Pacific Northwest in which gifts are bestowed upon guests and personal property is destroyed in a show of generosity and wealth.

   • That night there was a grand wedding and a potlach; so that for two days to follow there was no fishing done by the village. — 1900
2. •
   (Canada) A communal meal to which guests bring dishes to share; a potluck.