Source : WordNet®

pass water
     v : eliminate urine; "Again, the cat had made on the expensive
         rug" [syn: {make}, {urinate}, {piddle}, {puddle}, {micturate},
          {piss}, {pee}, {pee-pee}, {make water}, {relieve oneself},
          {take a leak}, {spend a penny}, {wee}, {wee-wee}]