大便在英语中通常有以下几种表达方式：

1. "excrement"

2. "feces"

3. "stool"

4. "defecate"

5. "to go to the bathroom"

6. "to use the restroom"

7. "to make a bowel movement"

8. "to take a shit"

您可以根据上下文选择合适的词汇