beaucoup: very many (French) - as in "beaucoup VC in the village"
C-Rats: C-rations (also, 49 c's - the last year they were produced, but we ate them anyhow)
Charlie: Viet Cong or VC or Cong
Choi oi: Program whereby enemy combatants who surrendered were paroled to join the Army of Vietnam (ARVN)
cowboys: gangs of street urchins - thieves and pick pockets like Fagin's crew in Oliver Twist by Charles Dickens
Di Di Mau: (Vietnamese: Di Di Mau Len) go away fast
Donut Dolly: (delta-delta) - female Red Cross program director
dust off: air ambulance
expectants: (triage) patient not expected to survive (usually shunted to the side and left to die when triage personnel are inundated with many casualties)
geographical bachelors: married men separated from spouses by long distances
getting your car washed – soldiers parked their vehicles in the middle of streams where Vietnamese urchins swarmed over them, washing away the grime of war while young girls sat in driver's laps servicing them. Thus getting your car washed became synonymous with sexual intercourse with a hooker.
gook: any Asian (pejorative)
immediates: (triage) patients requiring immediate attention
mamasan/papasan: Vietnamese woman/man - Japanese woman or man when used in that nation.
Number One - best
push: (triage) - large number of battle casualties arriving at medical facility
real world: life outside (before or after) the armed services
round-eye: (pejorative) - used by Vietnamese (and other Asians) to describe Americans (and other non-Asians)
Short - due to go home soon
sick call: (triage) - time allotted to care for the walking wounded
slant or slant-eye: (pejorative) - used to describe any Asian
slope: (pejorative) -any Asian
sorry 'bout that – Inadvertently administered harm to another, especially a non-combatant is a byproduct of all armed conflict. From random drive-by shootings in urban areas to death by friendly fire in the combat theater, people are injured and even killed, and property damaged almost daily. This is especially true when your enemy fights according to a doctrine wherein they are directed to hide among the civilian population. In Vietnam, we often responded to such incidents, “Sorry 'bout that.”
Steel Pot - helmet (also used as a chair, wash basic, pillow, and anything else we could think of)
strac: (high praise for a soldier) - tough and ready, all spit-shined and clean when preparing for a parade or guard mount
walking wounded: (triage) - patients whose care may be delayed until after all immediates are treated
Finally, let me clear up the confusion of the evolving name of the insurgents in Vietnam:
Viet: The Viet were the early peoples who occupied the area known today as Vietnam. They are ethnically related to the peoples inhabiting southern China and were originally referred to as the Lac. "Nam" means south. Thus, "Vietnam" is the land of the Viet to the south of China.