simmer up
verb1
Informal To cook a food through simmering.
- First, simmer up a portion of peas.
2
Broadly, Figuratively To arise, usually of an emotion, as if from a steamy, simmering action.
- Emotions simmered up when he saw his wife again.
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.