What is fum?

"Fum" is a Catalan word that translates to "smoke" or "fume" in English. It is commonly used to refer to the smoke produced by burning or combustion.

In Catalan cuisine, "fum" is often used as a key ingredient in traditional dishes such as "fumet de peix," a fish stock made by simmering fish bones and aromatics to create a fragrant broth.

In a broader context, "fum" can also be used metaphorically to describe something as being hazy, uncertain, or unclear. For example, the phrase "fer fum" can mean to deceive or trick someone.

Overall, "fum" is a versatile word that can be used in various contexts to describe smoke, fumes, or anything that is unclear or ambiguous.