What does "black eyes" mean in this situation? I've learnt an English text which included these sentences: Why do people play football? It's a stupid game, and dangerous too. Twenty-two men fight for two hours to kick a ball into a net. They get more black eyes than goals. I just didn't know why the person said "They get more black eyes than goals.". Can you tell me what does "black eyes" mean in this situation? Thanks in advance.