Top Definition
A term that originated on Facebook, Chapman's Law states that as an online argument grows longer and more heated, it becomes increasingly likely that somebody will question if a photo of someone is displaying their cumface. When such an event occurs, the person guilty of invoking Chapman's Law has effectively forfieted the argument.
"What a mentalist. All that with her kid in her arms!!"

"That Daily Mail pic is probably her cumface."

"Ah, so it's time to invoke Chapman's Law, is it?"
#chapman's #chapmans #law #godwin's #godwins #cumface #arguement #cum face
by TheMightyPrune November 29, 2011
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