Atheist jokes are typically based on the belief that there is no God or involve making fun of those who do believe in God. “What is so ironic about Atheists? All they ever talk about is God,” is an example of an atheist joke.
Another common theme of atheist jokes is their belief in science above all. “How many atheists does it take to change a light bulb? Two, one to change the bulb and one to record that his hypothesis was correct,” is an example of a science-atheist joke. The way an atheist is described in a joke, either being more or less intelligent than the religious, typically depends on the religious views of the joke teller.