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a TCG term that describes a person who only enforces rules to his or her advantage.
IMTHEMAN13: omg u cant attack me with that card!!!

the_chosen_giraffe: but you just did the same thing to me

IMTHEMAN13: u shud have said something idiot

the_chosen_giraffe: ok then, you're a sharker
by ojamajoz June 22, 2013
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For Steam / Online games that have a virtual economy. When a user takes advantage of a normally new user who is experienced in trading and steals the new user's items by low-balling him less then 20% of the items true value.

Ex. A new user has a item worth 100 usd A sharker adds them and trades his 20 usd item for the new players 100 usd item
Man JhejH PoT is such a sharker he traded his 200 usd item for a 2000 usd one with a noob...
by Hugh Mungus305 April 21, 2018
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