Looks like we have a crossover then Sony...
I've certainly heard them referred to as REDARSE and REDMONKEYS and a whole bunch of other stuff not suitable for publication. Which seems to be the low regard they are held in, right up until the point you need one.
Recruits tend to get referred to as "NIGS" from "New Guy in Germany" I believe , but it seems to have stuck to any recruit, "NUMPTIES" and "F*KWITS" seem popular as well.Oddly enough, I've never referred to a recruit as a "REDARSE" , but females do get referred to as "SPLITARSES", god alone knows why.
Slang will vary from Regiment to Regiment to Corps etc. Some items of slang are universal in the Forces, some unique to a certain group of people.
Service slang, is an ever evolving language, I'm sure I'd recognise very little of my fathers' slang
Tony