meat puppet
1. Some useless, irrelevant, or inconsequential person. Who the hell do you think you are to criticize me? You've never done anything meaningful in you're life—you're just a damn meat puppet! I hate commuting on the train to work with all the other meat puppets in this city.
2. vulgar slang A penis. My last roommate used to walk around in the nude, with his meat puppet hanging out and everything!