A fruitbat is a slang word for a male who exhibits stereotypical homosexual characteristics and mannerisms. This is used in social situations where using a more colorful word might be inappropriate. Note that a person doesn't have to actually be a homo to be considered a fruitbat, but merely to have something about them that could be construed as representing homosexuality.
I never really knew about Chuck... He seemed alright, but when he screamed and shrieked when he saw a bug, it dawned on me that maybe he was a fruitbat. That, or maybe the time he was wearing a dress, fishnet stockings, and eye makeup.
Demonic little fuckers that love to steal fruit from small children all over the world, leaving it only half eaten so it must be thrown away afterwards. Must be destroyed before it lays its seeds of decay and spawns more creatures from the souls of small children.