"Knifing" refers to the act of stabbing or attacking someone with a knife.
Sentences with «knifing»
Some of them are in churches, but most are the ones with knives in their backs, not the ones wielding them. (nakedpastor.com)
Stand the squash neck vertically on the flat cut and use a sharp knife with good weight to slice off the skin down the side of the neck. (soupaddict.com)
Using sharp knife in other hand, peel skin off one side, starting at stem end. (vegetariantimes.com)