What is Jackknife?
{{Orphan|date=May 2009}} A '''jackknife''' is a type of knife. It has a [[blade]] that folds into the [[Handle (grip)|handle]]. It is also a [[dive]] where the [[body]] is bent and then straightened before entering the water and when a person backs up in their vehicle with a trailer attached and it accidentally folds. {{military-stub}} [[Category:Blades]]