Regimental

[Sarah]

To go without underwear. Sometimes referred to as [commando] (female) or [free-balling] (male) in the United States. In fact, it is the way that Scots wearing kilts are supposed to be dressed, unless engaged in some sporting games (ie. Highland games) that my result in their testicles or penis coming into view.

[Kit]

connected with a particular regiment (= a large group of soldiers) :

[Tariq Zaki]

Relating to a regiment.