when 2 people are friends on Facebook, but only talk to each other through commenting each others statuses, pictures, or videos. Generally, do not talk on chat, phone, or in person, but have a strong relationship and understanding of point of views via comments. Small conversations may be carried, responding to a comment, in the commenting area.
"Do you ever talk to Jordyn?" "No, we are just comment friends."
by Mahnamana! February 27, 2010