Definition & Meaning of "throat-slitter"in English

What is the origin of the term "throat-slitter" and how is it used?

"Throat-slitter" is a slang term for a person regarded as violently dangerous or capable of murder. It appeared in English in the 20th century, combining the literal act of slitting someone's throat with a figurative label for extreme aggression or lethal intent. The term is used in informal, hostile, or dramatic contexts, often to emphasize danger or menace. It is strongly derogatory, violent, and never neutral, and conveys a clear threat or fear of harm.