buff

When used as a noun, this word conveys a sense of hobbyist passion rather than academic professionalism. It suggests a person who consumes information for pleasure and pride, often possessing a deep, niche expertise that exceeds the average person's knowledge. In a physical sense, the word evokes a tactile quality of smoothness and hardness. Whether referring to the act of polishing a surface to a mirror finish or describing a muscular physique, there is a shared connotation of refinement and the removal of roughness.