1. A very boastful and talkative person; a braggart
2. A self-important egomaniac who likes to toot his own horn, like those assholes who put bumper stickers on their cars that say "PROUD PARENTS OF AN HONOR STUDENT AT (blah blah blah) HIGH SCHOOL"
A person who spends all of his free timetrolling, scamming, and producing smear campaigns on social networks against groups and individuals or Cyber Cancer.