Knifer

Knifer is a rarely used, informal noun referring to someone who uses a knife, especially as a weapon. The term carries a negative connotation and often implies malicious intent or skill in knife fighting. While a knife is a common tool, the term "knifer" specifically highlights the potential for violence or aggression associated with the individual's use of the knife. It's not a formal occupation or profession. The term can also be used in a figurative sense to describe someone who is treacherous or backstabbing. More commonly, and less aggressively, it can describe a cook that is adept with knives.