Source: In November 2010, Cooks Source magazine was at the center of an Internet tornado after it was found that the magazine had stolen a writer's article without permission. An e-mail response from the magazine's editor implied that everything on the Web was public domain and the jilted author should have been grateful for having her work stolen.
When caught cooks sourcing, a person then becomes unreasonably arrogant, demands compensation for orchestrating the screw-over, and claims professional expertise on applicable cyber laws while demonstrating that they actually have less expertise than a teenage boy who just discovered there are things other than porn on the internet. See also: Griggs
In anger, people started to revolt to protect what was rightfully theirs. After all, Cooks Source was the center of all evil. And as people started using Cook Source as a term in conversation, new phrase had been born.
To use the term, simply state something terrible and blame it on Cooks Source, chances are it actually was their fault in the first place.