An enemy or opponent that equally exhibits excellence, attractiveness or has an admirable quality to them.
A really attractive man or
woman you
dislike or find questionable in their actions would be a good example.
OR
Used in the context of being
jealous or finding the person respectable still for their qualities that make the individual a strong opponent.
The person did steal my girl, but she seems a lot happier with him, even if he has fodacious
vibes.
That person is fodacious, she may seem
like a nice girl,
smart, good-looking and all, but she's rude.
He may be against our campaign's platform, but Bernie Sanders really is one fodacious man.