1. Someone who isn't afraid of the concept that there might not be a life after death.
2. Someone who does not bow down to a deity that constantly threatens to burn you alive for not believing in a certain way after said deity created you to believe in an alternate way.
3. Someone who, throughout history, has been the source of ridicule and offensiveness. However, when said atheist ridicules a christian, jew, or muslim they are labeled as offensive and blasphemous.
Christian #1: Hey look it's John the Atheist, let's go make fun of him.
Christian #2: Nah, let's convert him instead.