A gravenstede is when you get a little bit of pre cum on the outside of a condom and you get a girl pregnant with it
John; Hello Graham Graham; Hello John
John; I am in big trouble, 9 months ago i got some pre cum on the outside of my small size johnny and now Mindy is Pregnant!
Graham; Oh dear, you did a gravenstede. thats terrible.
When someone is unattractive but almost everyone finds them unbelievably sexy for no apparent reason. Though the "sexiness" may be linked to their voice, actions, charisma, and so on.
Girl1: Oh my god, he is so sexy!
Girl2: What, you think he's good looking?
Girl1: No, he's hideous.
Girl2: Then how do you find him sexy?!
Girl1: I don't know...It must be the 'Graverobber Effect".
Girl2: Oh, okay.