someone who lies alot to you and behind your back. someone who pisses you off all the time. They say they will hang but then they dont and they go hang with some other bitchy chick who she knows you hate. A bad best friend will say they will never do something.....and they do it. Bad best friends lie about secrets to make you feel sorry for them. They destroy your heart and your insides until you cant take it anymore. Thats when the victim gets sent to a crazy place or they commit sudicide.
Bad Best Friend: I will never get on *this website*
victim: Good. im happy you never lie.
Bad Best Friend: yup. BFF!
LATER THAT WEEK
lalala *goes to website to see stuff*
victim: HUH?! what are you doing?
Bad Best Friend: nothin.
victim: Oh OK! then i must be retarded cause it looks like your talking about me to her! and THAT CREEPER!
Bad Best Friend: oh well i didnt do thatt. myy bad.
victim; SHUT UP YOU STUPID WHORE LIAR!