noun a tool used in crimping boot fronts.
2. flounder ·noun the act of floundering.
3. flounder ·noun a flatfish of the family pleuronectidae, of many species.
4. flounder ·vi to fling the limbs and body, as in making efforts to move; to struggle, as a horse in the mire, or as a fish on land; to roll, toss, and tumble; to flounce.