jackknife
2. jackknife vt 1: to cut with a jackknife 2: to cause to jackknife 1: to double up like a jackknife 2: to turn or rise and form an angle of 90 degrees or less with each other - used esp. of a pair of vehicles
Webster's English Dictionary2. jackknife vt 1: to cut with a jackknife 2: to cause to jackknife 1: to double up like a jackknife 2: to turn or rise and form an angle of 90 degrees or less with each other - used esp. of a pair of vehicles