Synonym for parasitic life forms that walk upright whose main desires are: domination, manipulation, copulation (7 billion and counting) and creating drama whenever possible. We are not yet destroyed only because we serve as real life sitcoms for aliens to watch.
Alien number 1: Wow, look at those people killing each other!
Alien number 2: 3 million years and this series is still great!
Alien number 1: Can't believe they are still fun to watch but once they get boring and peaceful we'll wipe them out.