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Phrase(s): go to the bathroom
1. Fig. Euph. to go into and use a restroom, bathroom, or toilet. • Bill: Where is Bob? Jane: He went to the bathroom. • John went to the bathroom to brush his teeth. 2. Fig. Euph. to eliminate bodily wastes. • Mommy! The dog went to the bathroom on the carpet! • Billy’s in there going to the bathroom. Don’t disturb him.
McGrawhill's American Idioms And Phrasal Verbs