eat crow
When you mess up so bad you have to crawl out of a ditch and say you were wrong, even though your face is still red from being roasted.
My mom told me I was wrong about the math test and I had to eat crow in front of my class.
My brother lost the bet and had to admit I was right, even though he still called me a nerd.
My dog ate my homework and I had to eat crow in front of my teacher.