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title for a person with the initials MW. Derived from juvenile facilities and residential treatment centers where one's initials (MW) or ID # are used instead of their real name. People dont like to say em-double-you, it takes too long. So its em dub.

"(radio crackling) D9 will you please send em-double-you to the shift supervisors office please?"

"yo em dub! sups office wants you!"
by em_dub December 08, 2008
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