What Does It Mean to Dream About Jackknife?

To dream of a jackknife represents feelings about conflict where you notice there is a problem, or conflict where you feel you need to deal with problems on your own.

Example: A man dreamed of crossing a bridge, wondering if the water was safe to swim in, and a voice said "no, there might be jackknife fish in the water." In waking life he was worried that if he killed himself that he might screw it up in the middle of it and not kill himself cleanly.