It's simple, you don't need to be specific about what you're going to do in the bathroom, you can say 'Voy al baño', or if you want to provide more info 'Voy a orinar (pee)' is pretty common and not offensive, 'mear' is a word I use with friends but not so often. For pooping, I wouldn't say 'voy a cagar', I used a lot voy a ensuciar' when I was a kid because my mom taught me to speak that way. I've heard people say 'Voy a hacer popó', but they're always women. As a man, I'd say 'voy al baño', if someone ask for the reason (which they shouldn't), I'd say 'número 2' or 'a cagar or ensuciar' if the person is a family member or a close friend.
The Language Level symbol shows a user's proficiency in the languages they're interested in. Setting your Language Level helps other users provide you with answers that aren't too complex or too simple.
Has difficulty understanding even short answers in this language.
Can ask simple questions and can understand simple answers.
Can ask all types of general questions and can understand longer answers.
Can understand long, complex answers.
This answer was given within 60 minutes of the question being posted.
How do you say "Hello" in Korean? Find out on HiNative!