answer the call of nature
Verb
Meaning
answer the call of nature (third-person singular simple present answers the call of nature, present participle answering the call of nature, simple past and past participle answered the call of nature)
(idiomatic, euphemistic) To satisfy a bodily urge to urinate or defecate.
Synonyms
pee
piddle
urine
urinate
piss
do it
wee-wee
relieve oneself
micturate
take a leak
make water
spend a penny