I dont know a word in english that matches exacty but a Metiche is a person who tells you what to do with your life but in a bad way. Hmmm bad explanation, a person who, well a nasty motherfucker. A busybody, or a malicious busybody.
I know thats not a great explanation but if youve got others I can help im sure, I live in Madrid & lots of people speak Spanish
So keep em coming.