saiko
n.— «In Japanese, “Saiko” means “the best.” In Korean, however, saiko means the same as the English word “psycho.”» —“Of their own kind: Author for the 20-somethings” by Shin Hae-in Korea Herald (Seoul) Aug. 4, 2004. (source: Double-Tongued Dictionary)
Further reading
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Cat hair may be something you brush off, but cat hair is also a slang term that means “money.” In the same way, cat beer isn’t alcoholic — some people use cat beer as a joking term for “milk.” And imagine walking on a...