The line remind me of 1st Cav, tip to piss of anyone from first cav...
"The horse they never ride, the line the never crossed and the colors the reason why"
It's a yellow shield shape, with the line from upper left lower right and a horse head in it...
Lots of guys in 1st cav I wouldn't want to say that too, but plenty of them you'd be safe saying it....then again, the ones you wouldn't want to say it to are usually the only ones that would get it or get angry by it.