ETYM Cf. Swed. flundra.
1. Any of various European and non-European marine flatfish.
2. Flesh of any of various American and European flatfish.
Any of a number of flatfishes of several genera. A common North American species is the southern flounder Paralichthys lethostigma, a valuable food fish about 20 in/50 cm long.
To behave awkwardly; have difficulties.