DICT.TW Dictionary Taiwan

 jackknife
      n 1: a large knife with one or more folding blades [syn: clasp
           knife]
      2: a dive in which the diver bends to touch the ankles before
         straightening out
      v : dive into the water bending the body at the waist at a right
          angle, like a jackknife
      [also: jackknives (pl)]