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A "friend" who really isn't a friend at all, but rather assumes that they are your friend and becomes very needy and dependent on you because you are their only "friend" they have.
Friend 1: You're driving Kayla to and from school for the rest of the year?
Friend 2: ....Yeah...
Friend 1: I thought you hated her!
Friend 2: She's a parasitic friend
by HollaShawty May 25, 2010
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