potluck

When each of the guests at a party brings a dish for everyone to share, that's a potluck. If you're invited to a potluck, you might want to bring your famous macaroni and cheese.

This North American noun describes a particular type of meal, sometimes called a "covered-dish-supper" or a "dish-to-pass." If someone asks you to come to a potluck or a potluck supper, you'll want to be sure you don't arrive empty-handed. The potluck's origin dates to the Great Depression of the 1930s — earlier, the word meant "the luck of the pot, or food for an unexpected or uninvited guest."

Definitions of potluck
1

n 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”
Type of:
meal, repast
the food served and eaten at one time

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