Available Definitions:
1) n. - One who croaks, murmurs, grumbles, or complains unreasonably; one who habitually forebodes evil.
2) n. - A small American fish (Micropogon undulatus), of the Atlantic coast.
3) n. - An American fresh-water fish (Aplodinotus grunniens); -- called also drum.
4) n. - The surf fish of California.