Liberal claptrap is pretentious nonsense phrase used by conservatives as shorthand for everything they don't like about liberals. It has the wordy characteristics of liberal style, typically with a self-serving conclusion.
Liberal claptrap leaves the audience with nothing of substance, nothing that will help them personally overcome the inevitable problems of life.
Liberal claptrap often pushes the listener toward an illogical viewpoint without saying so in a direct manner. Liberal claptrap typically seeks to attract attention to a liberal and away from God.