buzz saw 
noun
North American term for circular saw.They can power an irrigation pump or a buzz saw for bucking firewood....
- Even a draft such as this, tailored to modern needs, would run into a buzz saw of criticism - from nervous parents, the higher-education lobby, and libertarians of both the left and right who would see it as a form of ‘slavery.’
- However, it quickly ran into a buzz saw of resistance from the increasingly powerful House Republicans, who derided it as an example of costly, unnecessary government bureaucracy.