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pot luck British English , pot‧luck American English

1
take pot luck
a) to choose something without knowing very much about it, and hope that it will be what you want :
We hadn't booked a hotel so we had to take pot luck.
We hadn't booked a hotel so we had to take pot luck.b) to have a meal at someone's home in which you eat whatever they have available, rather than food which has been specially bought for the occasion :
I'm not sure what there is in the fridge - you'll have to take pot luck.
I'm not sure what there is in the fridge - you'll have to take pot luck.2 [countable] American English a meal in which everyone who is invited brings something to eat :
Can you bring a salad? It's a potluck.
Can you bring a salad? It's a potluck.