People for the Ethical Treatment of Animals used the Burger King logo with the phrase ""Murder King"" to raise awareness about animal brutality in the beef industry. This is an example of .

Culture jamming

Explanation:

Culture jamming is a method used by most anti-consumerist social movements in initiating social change through the use of comical images or memes that stimulate the senses of people to make them question a social norm, with the sole aim of disrupting the status quo.

The above actions of the movement group, as stated in the question, is an example of culture jamming as they mimic humorously,the brand of “burger king logo” with the caption “murder king”,  order to disrupt the social norms of animal brutality in the beef industry.