1informal, derogatory Originally: a soldier who is unwilling to fight; (later chiefly) one who has little experience of combat, or whose duties are mainly ceremonial.
2informal, historical In the First World War (1914–18): a soldier in the 8th Infantry Brigade of the Australian Imperial Force, which arrived in Egypt too late to participate in the Gallipoli campaign. Frequently in plural with the, and with capital initials. Compare "choc".
3informal Chiefly in or with reference to the Second World War (1939–45): a conscript, a militiaman.
Late 19th century; earliest use found in Milwaukee (Wisconsin) Journal. From chocolate + soldier.