liquid dump 

when you take a shit but your feces are totally in liquid form.

I haven't shit a solid in weeks. I've only taken liquid dumps.

liquid dump by Hecto September 7, 2007

Liquidump 

A dump in the form of nearly 100% liquid. These dumps are commonly associated with a sharp, burning sensation and lethal stench. Common causes of a liquidump include greasy Mexican or Chinese food, mass amounts of beer, contaminated water, and various forms of the flu. Toilet paper companies profit largely off liquidumps as most jobs require half a roll, on average, to wipe.

"Hey man, I gotta use the john."
"Uhh, I'd stay outta there for at least a couple more hours. I just took a massive liquidump."
"I see... I'll just go outside then..."

Liquidump by Lenny Gregslovski January 28, 2008