Wide-eyed, adrenalin-filled psycho
grimace on one's face as you
charge in to battle/a fight/
game of chicken. Exemplified by "Full Metal Jacket".
HARTMAN
Let me
see your war face!
JOKER
Sir?
HARTMAN
You've got a war face? Aaaaaaaagh! That's a war face. Now let me
see your war face!
JOKER
Aaaaaaaagh!
HARTMAN
Bullshit! You didn't convince me! Let me see your real war face!
JOKER
Aaaaaaaaaaaaaaaaagh!
HARTMAN
You didn't scare me! Work on it!