What does the saying "Horse dead and cow fat" suggest about someone's statements?

The saying "Horse dead and cow fat" conveys a sense that a person's statements or claims may not be entirely truthful and are likely exaggerated. This metaphor implies that, similar to how a dead horse cannot serve any practical purpose and a fat cow is an indicator of exaggeration or inflation, the person may be embellishing their story or perspective beyond reasonable bounds. The imagery of a "dead horse" suggests something that is no longer of value or possibility, while "cow fat" can insinuate that the claims being made are overly inflated, lacking in reality, or the result of overstatement. Thus, the essence of the phrase points towards a warning that one should be cautious regarding the validity of what is being presented, reinforcing the idea that exaggeration is at play.