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boil something up
Rur. to cook a batch of food by boiling. She boiled some beans up for dinner. She boiled up some potatoes.
1. To prepare some food by boiling it: I boiled up some lobster for supper. Let's boil the potatoes up and fry them with ham.
2. To grow rapidly and steadily; escalate: Hostilities have been boiling up all over that part of the world.