flounder

Short definition from Wiktionary

Noun

1. 1
   A European species of flatfish having dull brown colouring with reddish-brown blotches; fluke, European flounder (Platichthys flesus).
2. 2
   Any of various flatfish of the family Pleuronectidae or Bothidae.
3. 3
   A bootmaker's tool for crimping boot fronts.

Verb

1. 1
   To act clumsily or confused; to struggle or be flustered.
2. 2
   To flop around as a fish out of water.
3. 3
   To make clumsy attempts to move or regain one's balance.
4. 4
   To be in serious difficulty.