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"
That includes those who attend our Saturday group in Saskatoon and the Thursday morning group in Kauai at which we have weekly sessions and potluck lunches. 包括那些参加我们的在萨斯卡通的星期六小组和在考艾岛的星期四清晨小组，我们有每周一次会议和午餐家常便饭。
The scheduled flight was canceled and passengers had to take potluck on the other airlines. 原定航班被取消了，乘客们只能在其他航线上试试运气。