Compulsively checking all social networking sites (Facebook, Twitter, OkCupid, Match, Foursquare, etc.), obsessively waiting for a new update or message to come through to give you your fix.
"I just wasted four hours on Facebook today. My social needia is getting to me!"
"My social needia is causing my hands to shake, I have to get my fix of Tweets."
December 23, 2010