I think my friend peed my bed
Why do you think he did that?
He's a irresponsible, stupid friend who doesn't think through his actions first.
I'm sorry they ruined your bed sheets, but you shouldn't embarrass them like that and think they are crazy. You don't know what health issues they have, and it could be serious. Be a little more understanding to them and they'll open up more to you.
That's it, I'm going to tell everyone to laugh at his new nickname.
I don't think it would be right of you to give your friend a nickname related to his bedwetting, because that would be really cruel. I think you should keep that information to yourself, and not share it with anyone, because your friend will probably be embarrassed.