Definition & Meaning of "pig-slammer"in English

What is the origin of the term "pig-slammer" and how is it used?

"Pig-slammer" is a slang insult that likely appeared in English in the late 20th or early 21st century, combining "pig" with "slammer" to create a harsh image of someone as disgusting, contemptible, or morally reprehensible. The metaphor links animal filth and aggressive action to a person's character, emphasizing depravity or repulsiveness. It is used in informal, hostile, or humorous contexts, such as online forums, casual speech, or satirical writing, to express strong disdain. The term is clearly derogatory and intended to insult; it is never neutral.