1.NounAn inspection of an object by smelling it, as for cleanliness of clothing or freshness of food.
"But does it pass the sniff test?"
2.NounAn informal check of whether an idea or proposal is credible, ethical, etc., using one's common sense or sense of propriety.
"But does it pass the sniff test?"
3.NounA medical procedure involving a person taking quick, short sniffs which cause contraction of the diaphragm during a fluoroscopy, enabling abnormalities of the diaphragm to be detected; diaphragm fluoroscopy.