potluck (noun)

whatever happens to be available especially when offered to an unexpected guest or when brought by guests and shared by all

"having arrived unannounced we had to take potluck"; "a potluck supper"

Potluck

A potluck is a gathering of people where each person or group of people may contribute a dish of food prepared by the person or the group of people, to be shared among the group. Synonyms include: potluck dinner, spread, Jacob's join, Jacob's supper, faith supper, covered dish supper, dish party, bring and share, shared lunch, pitch-in, carry-in, bring-a-plate, dish-to-pass, fuddle. It is also referred to as a smorgasbord or potlatch.

Potluck

A potluck is a communal gathering where each guest or group contributes a different, often homemade, dish of food to be shared. Other names for a "potluck" include: potluck dinner, shared lunch, spread, faith supper, carry-in dinner, covered-dish-supper, fuddle, Jacob's Join, and fellowship meal.