What was the nickname for the Vietnamese during the war?

The South Vietnamese Army was officially titled, the Army of the Republic of South Vietnam (A.R.V.N.). GI's, in a friendly way, usally referred to him as, "ARVIN the Marvin". Every GI had names for everybody; GI's stationed in the rear, were called, "REMF's", (Rear Echelon Mother------, which could be known to spark a fist fight), or "Base Camp Commando's", career miltary men, were referred to as, "lifers", GI's getting close to their end of tour in Vietnam, were, "Short Timers", and even this was shortened to, "Short!", tank crewmen were called, "Tread-heads", artillerymen were called, "Gun-bunnies" and "Red-Legs" (because artillery's flag/color is red), helicopters were called "birds", Cobra gunship helicopters were called "snakes", the United States was called, "THE WORLD", and the aircraft taking a man home was called the "FREEDOM BIRD", college students were nick-named, "Draft Dodgers". Victor Charley, Whiskey India Alpha, November Victor Alpha, Uniform Sierra, Tango Charlie...were ALL official call sign letters taken from the standard US Military phonetic alphabet, but would be used as normal titles on a daily basis (VC, WIA, NVA, US, TC (Tank Commander/Track Commander), etc.)