Someone who pretends to be your friend; but talks shit about u to other people
*** can also be said to be when 1 likes a boy and the friend knows that, and all of a sudden the friend likes the same person
Gosh Alex u are such a backstabber.... I told u I liked him and now all of a sudden u r flirting with him and touching him
by ask me October 19, 2003

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some one who says something to your face and another thing about you behind your back
NIALL:dude1 that song you wrote rocks i love it! im gonna write in on my dick so ill never forget it!
Dude1:ok cool but i gtg see ya!
Dude2: so niall what did he say
NIALL: oh he was being a fucking showoff about his song
Dude2: that song sucks though!
NIALL: yea i know man he fucking gets on my nerves
Dude1: Niall you backstabber
Niall: fuck off you lieing cunt! i dont fucking like you because your so arrogant!
Dude1: look in the fucking mirror and think

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a "friend" who seems to be ur "friend" 4 about 6 months then has nothing to do w/ u and makes excuses wen u invite them over or to do things because they have new "friends", who will most likeley discared like trash
we were good friends for about 6 months then "they" got new punk "freinds" and now "they" make excuses y we cant hang out any more
by wake up and smell the betrail January 08, 2005

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A person that smiles in ur face but all the time they wanna take ur place
Definiton comes from the OJays song Back Stabbers
by Tiffany T. July 10, 2003

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Some one who act nice to your face, but as soon as your back is turned they will turn nasty.

John101: Yeah mate, your in with a chance. Go for it!
Adam07: Really, Ok thanks dude. C u l9er.
John101: Hi Stacey, how are you?
StaceyXOX: i am fine.
John101: You know Adam, hes not interested in you. But i am.
StaceyXOX really?
John101: Yeah, i've liked you for ages!
StaceyXOX: well do you want to go out?
John101: definently

Adam07: yo stacey, look do you want to date me?
StaceyXOX: no sorry, i am dating john. Sorry
Adam07: Oh rite, no worries.

Adam07: John you backstabber, you know i like stacey but you got in there first - i hate you!
John101: i dnt care u loser, i never liked you. I AM WITH STACEY, not you. cya round
Adam07: get lost
by Bker101 November 27, 2007

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1. Using a person as your friend but actually really hating their guts.
2. Using a person as your friend, and then ditching them for new friends.
"Oh my god, that girl such a backstabber!" She said.
"Yeah, I know, I can't believe she'd do that," The other girl agreed.
by Lying Lisa January 24, 2008

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A backstabber is a friend who says she will be there for you and look out for you not 2 worry .. She continues the act and then 1 day when you and ur boyfriend break upo she confesses 2 him she has a crush on him ..
Martha is the biggest backstabber of life
by Miszpinky January 31, 2006

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