The little kiddie pool next to the big adult pool that the little kids swim and pee in. Also, the pool your drunken guests pee in when the keg is too close to the kiddie pool.
We went to the Old Man’s house on the 4th of July and the piss pool behind the house smelled of urine while the D.J. was playing the song, ooooh that smell, can’t you smell that smell? We invited the Old man over and knew we would have the big pool for the adults and the piss pool for the kids.