red-shirt

/R EH1 D SH ER1 T/
noun
  1. 1

    A member of the UDD (National United Front for Democracy), supporters of Prime Minister Shinawatra, (and subsequently Abhisit Vejajiva) in the conflict in Thailand after the 2006 coup d'etat.

  2. 2

    A follower of Giuseppe Garibaldi, an Italian revolutionary in the later nineteenth century.

  3. 3

    A member of a paramilitary arm of the Democratic party in Mississippi and South Carolina at the end of Reconstruction.

noun
  1. 1

    A minor character or member of a group, especially one who is expendable or likely to be killed.

  2. 2

    A sailor whose job it is to handle ordinance on an aircraft carrier.

Source: https://en.wiktionary.org/wiki/Red%20Shirt, https://en.wiktionary.org/wiki/red%20shirt, https://en.wiktionary.org/wiki/red-shirt