The phrase "high simmer" refers to a situation or emotion that is almost boiling or close to boiling point. It represents a state of intensity or buildup, where there is simmering tension or emotions ready to erupt.
Sentences with «high simmer»
soup pot, add bacon / ham, onion, garlic, celery, heat at high simmer until vegetables are soft (about 30 min) (mobimotherhood.org)
Turn heat to medium high Simmer broth, stirring occasionally until it thickens, about 15 - 20 minutes. (ibreatheimhungry.com)
Cover and bring it to a high simmer, bubbling constantly. (acouplecooks.com)