noun an upstart.
2. skipjack ·noun an elater; a snap bug, or snapping beetle.
3. skipjack ·noun a shallow sailboat with a rectilinear or v-shaped cross section.
4. skipjack ·noun 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.