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1.
The korean word for "sneaky person." Can be used to describe anything from difficult homework assignments to your cheating ex.
"Where'd you get that money? I thought you didn't have any."
"I took it from Jim, yamche style."

"How do you do this math problem? I've been working on it all night!"
(Your friend explains it)
"Oh! What a fucking yamche!"
by yamcheno1 April 22, 2010