Eat ass or become ass
You shout it when you're about to do something so dumb it might get you blown up or make you the most hated person in the squad.
"Eat ass or become ass" before I shot my own teammate.
"Eat ass or become ass" as I jumped into a room with no idea what was waiting for me.
"Eat ass or become ass" as I tried to take out a whole team with just a pistol."