The face attained by someone after they have been told off, done something stupid or disastrous, or just got done in a verbal fight. It's usually a face of half shock, smiling, red-faced and embaressed all at once and the person has just been burned.
A: Did you see john yesterday after he got done by peter?
B: Nahbro, what happened?
A: You had to see it, he had the biggest Cut Face! it was solid.