Informal (childish) term for urinating could be "wee wee" - It's pronounced like nintendo wii I suppose, but I am not a teacher.
Mummy! I need to go wee wee real bad!
Here you can find more examples :D
Urban Dictionary: wee wee
Student or Learner
Hi, Would you list most common expression of have a pee & going to bathroom? including polite & impolite expression.
The verb in AmE is to piss. (Vulgar)
Also common is to take a leak.
Yes. Also take a crap.
I suggest that both "take a dump" and anything involving the word "crap" would be considered at least moderately vulgar.
As a cultural note, Americans tend not to talk about this at all. If you were with a friend and had do this, you wouldn't say so. You'd say something like "I need to use the restroom" or simply "Would you excuse me for a moment?"
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.
Women will "powder their nose."
Sometimes men will "go see a man about a horse."