Top Definition
In the social network society, the unknown best friend is a friend know only with his written words (private message or private chat).
The relationship with the unknown best friend is close, long and mutual, with solidarity, protection and compatibility.
It's forbidden and unnecessary meet your unknown best friend.
I write to my unknown best friend everyday, but I'll never see him (or her), because it's not important: I belong to him (or her) through the mutual solidarity.
by gericokiller March 12, 2010
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