The definition of a shark is a carnivorous fish in the class Chondrichthyes, or a person who is skilled at deceiving others, or is slang for a person who is an expert in a certain activity.(noun)
Shark is defined as to live by deceiving people.(verb)
An example of to shark is to constantly cheat people out of their money to get by.
See shark in Webster's New World College Dictionary
Origin: prob. < Ger schurke, scoundrel, rogue, sharper < MHG schurgen, to push, mislead < IE *skēu- < base *sek-, to cut > saw
transitive verb, intransitive verb
Origin: ? akin to shark
See shark in American Heritage Dictionary 4
Origin: Origin unknown.
Learn more about shark