A pretend, or play, version of the British Army that has members believing they are more important than they actually are.
A common phrase used is "part time soldier, full time banging on about it..."
Matt- "alright mate just joined the army..."
friend- "you off to fight on the front line then?"
Matt- "... wel no... its the Territorial Army..."
friend- "thats not really the Army though is it?"
Matt- "i know but I dont have the fitness or right mentality for the REAL army"