Definition & Meaning of "crud bucket"in English

What is the origin of the term "crud bucket" and how is it used?

Crud bucket is a slang insult that appeared in mid–late 20th-century American English to describe a person regarded as worthless or unpleasant. Crud means dirt, filth, or worthless junk; a bucket is a container. Put together, it frames the person as nothing but a container for filth—someone whose value is equivalent to holding garbage. The insult works by reducing the person to a passive object whose only function is collecting nastiness. It's informal, blunt, and contemptuous, typically used in angry or mocking speech rather than neutral conversation.