[madison10]

Renege=to go back on a promise.

Renegade=person that goes back on a promise. (maddie10 definition)
Webster: an individual who rejects lawful or conventional behavior

LOL The SS sure named Obama well.

[messierhunter]

Renegade: a deserter from one faith, cause, or allegiance to another.
Merriam-Webster
Former muslim? lol

I think I like this one the best:
Renegade: of or like a renegade; traitorous.
dictionary.reference.com