Blue's Law: This behavior occurs during a political debate, most likely, via the internet. When a conservative is over come by logic he/she/it falls back on their primal reptilian instinct of aggression and uses the term liberal in any way in order to deflate the value of an argument or the other debater(s).
As a discussion board thread increases on a conservative forum, the likelihood of this increases, much like Godwin's law.
The accused in question automatically wins the argument regardless of debate ability. The conservative is then laughed out of any gathering for being a simple minded twit.
Timmy 1: I think we as a people should be more concerned with living in harmony with others as it would strength the state of the entire planet.
Timmy 2: Fuck you liberal douchebag pussy. USA USA USA #1!!!!
Timmy 1: I invoke Blue's Law. You're a dick. Go back to 1940s and operate the showers, you nazi.