1 definition by Mongoosegangsta

Top Definition
1)abbreviated term for Dumbass

1b)ussually used to cloak the term dumbass from figures of authority
1) Dude 1:Marco gave his e-mail in an internet chat.
Dude 2: That DM

2) The librarian said she would stab me if I called him a dumbass, I called him a DM instead
by Mongoosegangsta February 27, 2010

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