Shark

1. To play the petty thief; to practice fraud or trickery; to swindle.
2. To pick or gather indiscriminately or covertly.
3. To live by shifts and stratagems.
4. Trickery; fraud; petty rapine; as, to live upon the shark.
5. A rapacious, artful person; a sharper.
6. Any one of numerous species of elasmobranch fishes of the order Plagiostomi, found in all seas.