buzz-saw

Noun

buzz saw (plural buzz saws)

1. A powerful, noisy, motorized saw, typically having a rotary blade with large teeth, sometimes portable and sometimes mounted into a table.
   • The American mind exasperated the European as a buzz-saw might exasperate a pine forest.1905, Henry Adams, chapter 12, in The Education of Henry Adams

   Synonyms:

   circular saw

2. A type of noisemaker in the form of a spinning disc spun on an untwisting string like a whirligig.