1.n. A Christian who shares their religious beliefs with another in hopes of converting them.
2.n. A Christian who chooses to follow the Bible in its entirety, instead of picking and choosing which parts most conviently fit their current lifestyle. They live their life to fit the Bible, instead of twisting their interpretation of the Bible so they can still sin and not feel as guilty. They are often ridiculed for living as the Bible allows and trying to convert others.
That preacher was called a Bible thumper for handing out tracts to people in the community.