piss in WordNet English dictionary

1. eliminate urine
   "Again, the cat had made on the expensive rug"
   make  urinate  piddle  puddle  micturate  piss  pee  pee-pee  make water  relieve oneself  take a leak  spend a penny  wee  wee-wee  pass water 
   

1. informal terms for urination
   "he took a pee"
   peeing  pee  pissing  piss 
   
2. liquid excretory product
   "there was blood in his urine"; "the child had to make water"
   urine  piss  pee  piddle  weewee  water