A very selfish person who befriends you in all the Facebook aps (fishville, farmville, cafe world, etc), and never sends gifts to help you out.
Someone you send gifts to all the time in Facebook aps, and they never return the favor.
I sent Jerry a gift in farmville last week, that selfbooker never sent me one back.
Dude, dont send Raquel any more mystery boxes. That selfbooker wont send you anything back.
I need to build up my farm, but these selfbookers aren't helping me out!