Noun
a power saw that has a steel disk with cutting teeth on the periphery; rotates on a spindle
Source: WordNetbuzz-saw
Mr. President, the buzz saw that your healthcare bill ran into wasn't lobbyists and special interests it was tens of millions of American's who were saying, 'Stop!' John Boehner
The buzz saw snarled and rattled in the yard And made dust and dropped stove-length sticks of wood, Sweet-scented stuff when the breeze drew across it. Robert Frost