Just had to address this. While I'm pretty much a semi-spiritual agnostic these days, it still bugs me how many misconceptions there are about mormon people that are propagated as absolute fact.Mormons believe that Jesus was a created being: the elder brother of Lucifer (otherwise known as Satan, or the Devil).
The above statement is totally false. The church addressed this publicly on their website lately (after an issue with Mike Hukabee inquiring about that / being offensive toward Mit Romney).
If you'd like an answer to this question, in short its "the term brother was used as people use brother to address each other in church, but Jesus is most definitely not literally Lucifers "brother"".
A better explanation can be found below.