cormorant \KOR-mur-unt; -muh-rant\ , noun:
1. Any species of Phalacrocorax, a genus of sea birds having a sac under the beak; the shag. Cormorants devour fish voraciously, and have become the emblem of gluttony. They are generally black, and hence are called sea ravens, and coalgeese.
2. A gluttonous, greedy, or rapacious person.
Kevin was precocious and from the first displayed a unsatiable appetite for books. He later characterised himself as "a library cormorant."
Cormorant comes from Old French cormareng, "raven of the sea," from corb, "raven" (from Latin corvus) + marenc, "of the sea" (from Latin marinus, from mare, "sea").