Definition of shock trooper in US English:

shock trooper

noun

  • A soldier specially trained and equipped for carrying out sudden assaults, especially against enemy strongholds; a member of a shock troop.

Origin

Early 20th century; earliest use found in The Charleston Daily Mail. From shock + trooper, after shock troop.

Pronunciation

shock trooper

/ˈʃɒk ˌtruːpə/