A nonsense filler word used as a subject for posts. The first letters on the second line of most keyboard. A person may use these letters instead of thinking up a title for a message {on those message [..]

Laugh out loud

{n} a negative referent for a person who posts on a discussion board for the purpose of disrupting the conversation

MEANING

As Far As I Know

short for 'message board' similar to "bulletin board' and 'discussion forum'; discussion forums are more interactive than message boards or bulletin boards

short for 'Web log'; an online dairy of your thoughts on a specific topic or whatever crosses your mind; see discussion forum

a person who blogs {a person who post comments or questions on blogs}

{vb} the act of posting on blogs

{adj} those things related to blogs