In this text, ‘whistles like an old-fashioned kettle on the boil,’ is an example of a:
all right then, i say, so what about dr clark’s claim that “most severe ailments” have a connection with being dehydrated? professor hall leans back in his chair and whistles like an old-fashioned kettle on the boil. “if he’s trying to make the case that people are thirsty without knowing it, and if they just drank a little more they could sidestep everything from dementia to cancer, well, he better start making room on his mantelpiece for a nobel prize. maybe even two.”