shark

Any of numerous cartilaginous fishes of the subclass Elasmobranchii that are chiefly carnivorous and marine. Sharks have a streamlined torpedolike body, five to seven gill openings on each side of the head, a large oil-filled liver, and tough skin covered with small toothlike scales.

A person, such as a loan shark, who takes advantage of the misfortune of others for personal gain.

A person unusually skilled in a particular activity.

To obtain by deceitful or underhand means.

To take advantage of others for personal gain, especially by fraud and trickery.

A sharper; a cheat; a greedy, dishonest fellow who eagerly preys upon others; a rapacious swindler.

The sharp practice and petty shifts and stratagems of a swindler or needy adventurer.

To play the shark or needy adventurer; live by one’s wits; depend on or practise the shifts and stratagems of a needy adventurer; swindle: sometimes with an impersonal it: as, to shark for a living.

To pick up; obtain or get together by sharking: with up or out.

A selachian of the subclass Plagiostomi, of an elongate form, with the pectoral fins moderately developed, the branchial apertures lateral, and the mouth inferior (rarely terminal).