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The abbreviated form of the stage name of Rap Monster (real name, Kim Nam-Joon) The leader of the k-pop group Bangtan Boys (also known as BTS) he sports some of the funnest hair colors, and is the reputed source of the diss "You got no Jams"

He has a voice that can set fire to the mic or lull you to sleep with his rhymes.
Rapmon's hair is always so perfect, he likely goes through four cans of hairspray a week.
by Silentnoki June 10, 2015
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