Frequently used as an insult by internet atheists who, lacking a large enough penis, must find other ways to appear adequate.
Person 1: Hello, I am a Hindu/Jew/Christian/etc... person.
Person 2: BRAINWASHED THEIST!!! U R DUM!!! Y U NO LIEK SCIENCE!?
Person 1: Actually, I happen to be a published physics professor, so I think science is pretty good.
Person 2: QUANTUM MECHANICS SEZ STUFF COMES FROM NOTHING!!! GOD IS DUM!!!
Person 1: Actually, QM doesn't say that at all. Perhaps you should actually learn what you're talking about before you act like a moron on the internet.