When someone does something on Facebook just to make a point, or have everyone else see it. Can be done by a status, or joining of a group. Usually not a direct comment or wall post.
Facebook news feed: Brain just became a fan of "Harvard Business School Class of 2014"
Carlos: Man, Brain is such an asshole, he just wants everyone to see that and rub it in their face. He's just conspicuous facebooking like always.
Status: Meg just got a 2400 on her SAT!
Julie: Meg is such a jerk, everyone knows she's a fucking genius, why does she have to gloat all the time?
The act of going on Facebook while drunk, specifically the comments left and messages sent by a drunk person while on Facebook which are typically misspelled, unrecognizable, funny, and/or creepy.
He was totally faceboozing last night, just look at the comment he left on my page: "Hey just wanted ti say hey ur hot theres nothig to do late at night. WHy didnt you return my text message im a ggod guy and we should hagne out more whe nmy roomate leaves i will come over to your room to asy hi im persom ok bye"