1. a metal, refillable lighter that is known for it's rugged design. It is windproof, and has a lifetime guarantee, which is why it's become so popular over tha ages. Zippos often have designs on them to give them "personality." a fuel button does not need to be pressed in order to keep lit, it turns off by closing the lid.
2. a derogatory word used by the military for flamethrower tanks.