What does "skipjack" mean?

Additional senses

1. 2.(Zoöl.) A name given to several kinds of a fish, as the common bluefish, the alewife, the bonito, the butterfish, the cutlass fish, the jurel, the leather jacket, the runner, the saurel, the saury, the threadfish, etc.
2. 3.(Naut.) A shallow sailboat with a rectilinear or V-shaped cross section.