cut the cheese
This idiom references the foul smell emitted by some cheeses many of which have a rind that keep the odor in. Once the rind is pierced, as in the case of slicing it, the not so pleasant smell is released. This smell can be remarkably similar to one passing gas, depending on the cheese, and the person.
- cut the cheese in the Dictionary.com Unabridged, v1.0.1, Lexico Publishing Group, 2006.