One who laughs or over compliments online posts such as twitter in order to gain favor or return "follows". Also one who "Guffaws" at everything others post to gain favor and gain a return follow.
Jan: I get so much attention on Twitter... I'm following this person who is so funny, articulate and popular, plus he loves my hiaku Tweets! I have a great time in our exchanges! Not to mention I'm up to 400 followers myself now.
Carol: Oh my God, you're such a gafollower.