Eat ass or become ass
You yell this when you're about to do something so dumb it might get you killed or make you look like a complete idiot.
"Eat ass or become ass" as I charged into a room full of enemies with no cover.
"Eat ass or become ass" before I dropped a smoke grenade in the middle of a fight.
"Eat ass or become ass" as I jumped out of a window with no idea where I was going."