in military a private or with a similarly subordinate rank who thinks they are in charge and barks orders usually at those with the same rank. orders in this context are typically given by drill sargeants.
the drill private independently assumes the authority of a drill sargeant and will begin to give orders to other privates which are usually wholly ignored.
shut the fuck up drill private!
whatever you say drill private.
That moment of desperate repression when someone has severely pissed you off but verbally skull-fucking them would end in divorce / joblessness / restraining order / social services intervention.
"Man, my mother-in-law turned up today and decided she was staying for Christmas. I had a total brain-nuke trying not to tell that bitch to fuck her tinsel and kick her ass out"