"(as|) crooked as a dog's hind leg" の定義と意味

What is the origin of the idiom "crooked as a dog's hind leg" and when to use it?

The idiom "crooked as a dog's hind leg" is a colloquial expression that vividly describes something or someone as extremely dishonest or morally corrupt. The origin of this idiom is unclear, but it likely draws upon the association of a dog's hind leg as being less straight and more irregular in shape compared to the front legs. The imagery conveys a sense of extreme deviation from honesty or fairness, emphasizing a lack of integrity or trustworthiness.