Belly Builder
Food lovers might call themselves belly builders, but this term refers to the person who builds the main cavity, or belly, of a piano. Before being applied to the piano in this sense, the word belly was used as an unofficial term for the curved part of a violin. The piano’s belly is technically called the soundboard; a belly builder engages in “bellying” or outfitting the soundboard with everything needed in the piano’s interior, like the bridge that guides all the piano strings.