This term refers to being the victim of someone who has deliberately and intentionally swindled, grifted or in any manner taken advantage of, always in an unfair manner.

Someone who has schiested you has fucked you out of something.

People who've been schiested not only live with the loss of money or property but also the disappointment of having let themselves be taken advantage of. As such, many people who get schiested never report the incident due to the loss of pride and self respect, making it one of the most underrated problems in modern society.
"I went to Jack in The Box and the person schiested me out of my $5.00 bill."

"That son of a bitch schiested me out of my house and home."

"That rat bastard schiested my fiancee!"

"That shit bird schiested me out of my deposit!"
by PCP7777 March 5, 2012
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A very thievish individual. A trickster. A cunning bastard. Sorta like how politicians are dirty scheists. Lawyer-esque. A bro.
BK: Wow my brother ate my entire bag of chips when he only said he'll take a few!

BK's Friend: Wow, what a fucking schiest!
by The Schiest-kamf October 13, 2010
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The act of becoming drunk, plastered, hammered, etc...
"Let's get shit-faced!"

"Hey guys who wants to get schiested?"

"Let's get schiested!"
by Carguy96 May 3, 2014
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