poop water noun4 •(disapproving, nonstandard) Reclaimed wastewater.Many residents of the nearby town oppose the use of reclaimed wastewater in their tap water supply; they react with disgust at consuming "poop water." •(informal) Water contaminated with feces; unreclaimed wastewater.When the sewage pipes burst, the underground parking garage was flooded with poop water. •(informal) diarrheaI took my dog to the vet because he had poop water. •(informal, disapproving) A beverage perceived as being of unsatisfactorily poor quality and taste.The cheap soda is nothing but poop water.