A knife with blades or tools that the user can fold or retract into its handle, and of a size small enough for carrying safely and handily in a pocket, especially when suited to heavier duty uses or ad hoc applications outdoors or in workshops.
A knife, especially a makeshift one fashioned from something not normally used as a weapon (like a plastic spoon or a toothbrush).
A particular woody by-product of processing flax or hemp.
To stab someone with a shiv.
To stab someone with anything not normally used as a stabbing weapon.