to urinate or excrete the contents of the bowels.

Mommy, I don't need to go to the bathroom.

I took the dog out to go to the bathroom.

• reach the end of tether
• reach the end of the line
• reach the end of the road
• reach the end of your tether
• read between the lines
• read cover to cover
• read from cover to cover
• read into
• read into something
• read like a book
• read mind
• Read my lips!
• read someone like a book
• read someone's mind
• read someone the riot act
• read something cover to cover
• read something from cover to cover
• read something into
• read something into something
• read the fine print
• read the riot act
• read the runes
• read the small print
• read the writing on the wall
• read up on