An abbreviation meaning There Is No God. Popularly used to declare a person's atheism.
Theist: I hate gays. God says it's a sin to lie with another man. And there different.
Atheist and tolerant dude: Man, stop mindlessly following a 2000 year old book which at every turn is contradicted by science, logic, and basic morality. Gays are the same as you and me, they just like men. They don't have any choice in their orientation and besides what they do in the sanctity of their own home is their own concern. TISNG