Origin: Hokkien/English/Army lingo – a name to describe a newly enlisted soldier
Chao Private refers to a newly enlisted soldier. The word “chao” stands for smelly in hokkien and Private is the rank for a newly enlisted Soldier.
The words used together form a name that is often used on new recruits by other older soldiers; who are of higher rank and is usually an instructor.
“Chao Recruit” is often used as well.
Army Sergeant talking to new recruits: Eh why never greet me huh? You chao privates treat me as invisible is it?? Whole lot drop 20!! (corporal punishment of 20 push-ups).