river trout
When the Hudson River collected sewage from surrounding communities, swimmers and fishermen referred to the floating turds as "river trout."
I swam from New Jersey to New York but the river trout got me.
East river trout
Any floating object, usually fecal material or condom, flowing down an urban body of water
Danny dangled his fingers over the edge of the boat as it drifted downtown, until his had hit something soft. He recoiled and saw that it was a large brown East river trout