can opener

noun5

1. •
   A device used to open tin cans, usually by slicing the lid off.
2. •
   (slang) A tool for safecracking.

   • Even the work of opening a safe with nitroglycerine or with a can opener places the criminal in a state of nervous tension. — 1933
3. •
   A shoulder hit to the chest, usually accomplished while moving from a crouched to a standing position.
4. •
   (slang) An anti-tank munition or attack vehicle, that opens up armour like a tin can.
5. •
   (slang) A ramming maneuver, that opens up the target ship like a tin can.