Definition of dog soldier in US English:

dog soldier

noun

US
  • 1Chiefly with capital initials. A member of any of various (elite) military societies among certain North American Indian peoples of the Great Plains. Also occasionally in extended use: a Plains Indian warrior, especially one regarded as hostile or uncompromising. Now chiefly historical.

  • 2Military informal. A soldier of low rank; an infantry soldier, a ‘grunt’.

  • 3A dog used by the military, especially in active combat.

Origin

Mid 19th century; earliest use found in Rufus B. Sage (1817–1893). From dog + soldier.

Pronunciation

dog soldier

/ˈdɒɡ ˌsəʊldʒə/