dump train 

Multiple individuals taking dumps in rapid succession in the same toilet, without flushing, in an attempt to create a mountain of poo that "crests" the water level in the toilet bowl. Although cresting is desirable, it is a non-essential part of running a dump train, especially if the only dumps that can be mustered are liquid in nature. Typically, a dump train requires 5 or more participants, although fewer may be necessary if explosive diarrhea is involved.

We spent $75 at Taco Bell last night just so we could run a dump train on our neighbor's apartment.

dump train by dumptastic December 9, 2008

dump train 

The act of multiple individuals taking a dump in the same toilet in rapid succession without flushing.

The janitor complained to school officials after we ran a dump train on our high school's bathroom.

dump train by heavyc725 December 9, 2008

train spotting dump 

A fast-coming, better get to a toilet in 10 seconds or less or it’s gonna be running down my leg, shit.

I was eating some greasy fish and chips and all of a sudden I had to take a train spotting dump.

train spotting dump by KPS Alumni March 26, 2013