dem

1. nonstandardNonstandard form of them.

   Go tell dem natty dreadlocks no wear handcuff,” advises Damian Marley, his guest star and younger brother, who accuses the officers of jealousy.

   2007 February 25, Sia Michel, “Stephen Marley in Tallahassee, M.I.A. in India and Klaxons on Fire”, in New York Times

1. nonstandardNonstandard form of them, in the sense of "those".

   What are dem fings doing ’ere?

2. CaribbeanJamaicaMulticultural London Englishslang(clitic, suffix) A group of.

   Love tenderness is what the woman dem want

   1956, “Give Her Love”, performed by Chin’s Calypso Sextet

   2 more examples

   Chillin' wiv da man dem Jammin' wiv da man dem It's all good in the hood wiv da man dem

   2009, Dizzee Rascal, Chillin' Wiv Da Man Dem

   I’ve got my peeps dem with me shouting pull up your socks, Cos we just broke the law and now we're running from cops.

   2010, Plan B, Stay Too Long

plural Dems

1. USabbreviationclippinggovernmentClipping of Democrat.

plural DEMs

1. abbreviationcountableinitialismInitialism of digital elevation model.

   The DEMs and reference data used here are a mix of different vertical reference systems: […]

   2020, Guy Jean-Pierre Schumann, Paul Bates, editors, The Need for a High-Accuracy, Open-Access Global Digital Elevation Model, Frontiers Media SA, →ISBN, page 21

2. abbreviationcountableinitialismuncountablechemistryInitialism of diethyl malonate.
3. abbreviationcountableinitialismuncountablecomputingInitialism of digital experience monitoring.

1. USabbreviationgovernmentAbbreviation of Democratic Party.