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1.
refers to feces which has dropped into a body of water other than the toilet -- especially (but not limited to) a bath tub.
"we tried to take a romantic bath, but he let a couple tub trout loose"

"i was sailing with matt, and he had to drop a duece, there was no head on the craft, so he squatted over the side and stocked the lake with a couple tub trout"
by protocoldroid June 21, 2004