Granted, that phrase has several meanings, but I’m still a fan.
In a lost-comm scenario, sometimes you need visual signals, be those a green star cluster to initiate an attack or a red star cluster to shift fires. If you need to call bullshit, then the brown star cluster is invaluable. And in a sensitive, nurturing, caring environment, saying “This is complete and utter BULLSHIT!” is off limits.
“Hey, I’ve got to shoot up the brown star cluster on that plan,” is, I think, a little more restrained and far more acceptable, whether in the military or civilian worlds. I think we need to educate civilians on this term. It needs to be used more often.