Definition of "MSM"

MSM

noun
countable and uncountable, plural MSM or MSMs
1. (organic chemistry) Initialism of methylsulfonylmethane.
2. (media, often derogatory) Initialism of mainstream media.
  Quotations
  Who can doubt there ought to be a law when the MSM shills for environmentalist scaremongers?
  2005 July 25, David Hogberg, “Soaking in Chemical Stews”, in The American Spectator‎, archived from the original on 2021-05-06
  Interesting that initial reports from MSM failed to mention that Lombard is gay and this his adopted son is Black.
  2022 February 27, Hillary and the Russian payroll, “Frank Lombard is Duke Professor Gay Adoptive Rapist Dad: MSM Doesn't Care”, in alt.politics.usa.republican‎ (Usenet)
3. (epidemiology) Initialism of men who have sex with men.
4. (Internet slang) Synonym of M4M; Initialism of men seeking men/males seeking males.
5. (uncountable) Initialism of mechanically separated meat.
proper noun
1. (military, US) Initialism of Meritorious Service Medal.
2. Initialism of Modern Standard Mandarin.
phrase
1. (driving) Initialism of mirror, signal, maneuver.