Something that is created in a way that feels artificial and unrealistic, as apposed to something that arises spontaneously through nature.
Waluigi was only created for the purposes of giving Wario a Tennis Partner; He only exists to be Roster Filler. Contrived because he wasn't created organically through the creators own passion.
A proven willingness to creatively modify scripture, oppress alternative translations and categorically deny contrary, dis-confirming evidence ... all in a desperate attempt to satisfy the criteria of messiahship.
If you came to understand that the 'virgin birth' was ecumenically contrived, would you still need to believe it? What about walking on water...?