October 6, 2010 Urban Word of the Day
A person who tries to claim ties to every religion out of fear of picking the "wrong" one. This in turn forms a paradox because some religions, such as Hinduism and Judiasm contradict each other as the former is polytheistic and the latter explicitly states that there is only one God.
A typical Alltheist may believe in Jesus, Hindu gods, and even the Flying Spaghetti Monster.
Guy: I don't want to go to hell, so I'll just become an Alltheist
Girlfriend: Why am I even going out with you?