buzz saw [buhz-saw]
noun
1. A power-operated circular saw, so named because of the noise it makes.
EX. This is also the second part of best strategy to use in Half Life 2. "1. Strike with crowbar until enemy stops moving. 2. If that doesn't work, shoot with buzz saw blades until half of your foe's head is displayed on a wall. 3. Never say anything."