EFG stands for Epic Fail Guy. He is a meme on the website 4chan. He is usually represented as a stick figure wearing a Guy Fawkes mask, and never does anything right. Combo? Fail. Meme? Fail. Comment? Joke? All fail. He can't evenshoop a decent whoop.
The belief of God. When you are a Christian, you go to church and read the bible. Some Christians get baptized. According to Christianity, when you die, if you don't believe in Jesus Christ, you will go to Hell. If you do believe in the Lord and are a Christian, you will go to a wonderful place called Heaven where all of your friends and family who are no longer among Earth live. According to Christians, the end of the world will result in God fighting Satin, the Devil.