While playing multi player micro machines one player aggressively and without warning destroys or sends flying another. “Holy shit! That was a P.D.M.!”
by Barf Vader May 2, 2008
PiNK DiAMOND MAFiA. A new female cliquesimilar tot the Pink Ladies, but definitely more urban.this group originated in Southeast San Diego, and can be identified by their gold name plate necklaces that read: P.D.M. in Old English text with a literal pink diamond in the upper left hand of the "P". the Pink Diamond Mafia is into getting cake and they've got the most haters on the pacific coast if you are said to be PDM-ing, you are making money, acting snobby, and looking good.
by LAyDeE ViRGO September 20, 2007