"Bouchonnaise" refers to the pungent odor caused by a faulty cork, or to wine that has been affected by it.
The name is said to come from the French word "bouchon," which means cork, and the aroma of corked wine is often described as reminiscent of wet cardboard, a foul-smelling rag, or rotten vegetables.
It is said that cork taint occurs when bacteria on natural cork reacts with the chlorine-based disinfectant used to disinfect the cork, resulting in a chemical reaction called "TCA."
Cork taint can also be caused not only by the cork, but also by influences from the wooden barrel.