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.

river trout by aegrotatio March 31, 2009

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

East river trout by wstlnguy June 26, 2009