cluster-comment 

To inform (via message) a large group of people on social networking sites (ie myspace or facebook) in an attempt to exclude members who would ordinarily be informed by posting bulletins or announcements.

Monica cluster-commented her myspace friends about her birthday party. She could have just as easily sent out a bulletin, but wanted to be selective about who she told.

cluster-comment by juniper love November 6, 2006

cluster-comment 

(verb)
To mass-message a large number of people using an identical message via the comment, wall, or guestbook section of social networking sites (ie, myspace or friendster), often for the purpose of quickly alerting a large number of people to information such as an event or breaking news story.

Nicole: Hey, did you tell everyone to meet at Shakedown on Saturday?
Carlos: Yeah, i cluster-commented the flyer to everyone on myspace.

cluster-comment by sp00ki October 9, 2006