A friend whose opinion of a movie or song is swayed by what other people/The Internet says, regardless of how they feel.
Frank: I really liked that movie
Bob: I hated that movie
Frank: Yeah, me too
Bob: You're such a WikiFriend! Just make your own opinion.
A friend whose mind or opinion on something can be changed simply by an opposing comment.
Bill: That movie wasn't too amazing.
Kiefer: I thought it was pretty good.
Bill: Yeah, me too.
Kiefer: Nice to have a wikifriend like you.