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To describe a person with really small eyes (especially asians) that is either a slit or looks like a vagina. Can be another way of describing something really small.
John: Look at his eyes, how the hell is he gonna see anything through that line?
Bob: Now that's a lang cheng
John: I reckon ay
by wuming June 07, 2007

Words related to lang cheng

cheng lang minute slit small