mop(redirected from mop up)
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an implement with a wooden handle and a head made of twists of cotton or a piece of synthetic sponge, used for polishing or washing floors, or washing dishes
(in various parts of England) an annual fair at which formerly servants were hired
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
MOP(Millionaire On Paper) People who have wealth tied up in company stock options, which cannot be exercised until a certain date. During the dot-com boom, tens of thousands of MOPs were created, but many unfortunately never cashed in before the stock became worthless. See also MOPS.
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