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First used by the boys from the band Lik-Wid (www.lik-wid.net) DSM meaning Dead Set Maniac.
Mik - Hey man, fuck that guy from weekend at bernies is funny as.

Ryan - Yer man he is a DSM
by Ryan September 14, 2004
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24
A telemarketer that continually uses the words Dude, Stuff, or Man during a phone conversation
DSM kept kept calling the same business with no luck
by shadow October 08, 2003
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26
{DSM} means dick sucking mouth for all you hoes in the world.
Bitch stop criticizing me with your {dsm}.
by Saucygirl123456 July 31, 2016
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