Live journal started out as another blog provider. where people at one point could... blog, Since then it has been a place for teens to be angsty and defient against their parents. now here's where the slang comes in
People now use livejournal as a verb "dude i'm going to livejournal this so hard" meaning i'm going to complain about it on the internet,
"live journals down, my first instict was to livejournal it.... i've reached a new level of sad."