spunk

Spunk, in its most common and widely understood meaning, refers to a type of fungus, specifically members of the genus Spongipellis or Trametes that are often found growing on wood. These are typically polypore fungi, characterized by their tough, leathery texture and pores on the underside instead of gills. They are often found in forests and woodlands, playing a role in the decomposition of dead or dying trees. Different species of spunk exhibit varying appearances, but many are somewhat woody or corky in texture. Historically, some types of spunk have been utilized for practical purposes, such as tinder for starting fires due to their dry, fibrous nature.

The term "spunk" can also carry other, less common or slang meanings. In some contexts, it is used informally to refer to courage, spirit, or determination. This usage is generally considered colloquial and is distinct from the fungal definition. Additionally, the term has historically been used as slang for semen, though this meaning is less prevalent in contemporary usage. It is important to consider the context when encountering the word "spunk" to understand which meaning is intended. The fungal definition remains the most established and scientific usage of the term.