A Phedra, is just like one of those droopy plants that sits in the corner of your room. You forget about it and never water it but somehow, it still manages to survive and 50 years later it will still be there living. So basically you can never get rid of a Phedra, because it will just be there following you. (this can also occur with people)
Person 1: Hey do you see that girl over there? She's been following me all day, kinda scary really.
Person 2: Oh are you talking about the one that's sort of drooping along, not really looking at anything but just happens to be there?
Person 1: Yeah that's the one i'm talking about.
Person 2: Oh don't worry, just your common Phedra.