From Longman Dictionary of Contemporary Englishgo to the toiletgo to the toiletespecially British EnglishHBH to pass waste liquid or waste matter from your body Mummy, I need to go to the toilet! → toilet
Examples from the Corpus
go to the toilet• I couldn't be bothered to go to the toilet and they always came and changed me.• Encourage those who are mobile to go to the toilet on their own.• I really needed to go to the toilet, but that meant walking past them on to the other side of the hall.• Over the next day and a half she only left the room twice to go to the toilet.• The old man got up to go to the toilet again.• Then, next time you go to the toilet, try this stop test half way through emptying your bladder. 