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n. "Just my fucking kidneys" Derived by accident from the term coined in 2010, "Just my fucking kidding" --- JMFK can mean an array of different things, but is usually used in a situation that "just kidding" or "holy shit" would have sufficed, but the user really wanted to impress that other girl in the room and went balls-out. --- As the kidneys are a vital organ in most life forms on this planet, it makes absolutely no sense in this phrase. Use it wisely.
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