“Why, yes…there was Rosier,” said Karkaroff hurriedly. “Evan Rosier.”
“Rosier is dead,” said Crouch. “He was caught shortly after you were too. He preferred to fight rather than come quietly and was killed in the struggle.”
“Took a bit of me with him, though,” whispered Moody to Harry's right. Harry looked around at him once more, and saw him indicating the large chunk out of his nose to Dumbledore.
I figure "Took a bit of me with him" probably mean Moody sacrificed something while dealing with Rosier. According to the later context, it probably refers to the large chunk on his nose(I don't understand "out of nose" here either). How should we understand it in this context?
-- From Harry Potter and the Goblet of Fire