Again, from http://www.creationtheory.org/Essays/Phrases.xhtml
Atheism
Normal Person's Definition (Merriam-Webster): “Disbelief in the existence of deities.”
Fundie Definition: “People who reject God.”
Fundies are utterly convinced that atheists secretly believe in God, but choose to reject him for some reason. Usually they believe that the atheist is angry or "bitter" about God or that the atheist is guilty of some terrible sin and wishes to avoid "accountability" to God for his crimes.
Their dirty little secret is that they assume these things because that is how the fundies themselves have felt at least once in their lives, usually at some low point.