a negative ass name for a man. Castifer is just one of the rarest men you'll previously meet. His attitude differs along with his environment. And with that said, he is able to be a rather secretive and mysterious man. He just falls for one ladies. When he does, it is because of an extended thought out commitment that may never end. Don't expect you'll make this mans affections quickly. He Loves almost no one. Can also be spelled as Kastyfer.