would be someone who's way of life is to obey Christ. The word Christian simply means Christ-like.
As for who ends up in hell, that's up to God. I think the Bible is pretty clear on the subject of hell but there are also many verses that tell us it is possible for some to avoid going there:
"For God so loved the world, that He gave His only begotten Son, that whoever believes in Him shall not perish, but have eternal life. For God did not send the Son into the world to judge the world, but that the world might be saved through Him." John 3:16-17
Also, to those who have already been forgiven, a reminder that salvation is a free gift and not something we earned:
"For by grace you have been saved through faith; and that not of yourselves, it is the gift of God; not as a result of works, so that no one may boast." Ephesians 2:8-9
Ron Paul - Honorary Founding Father