Dump a Lump 

1. To shit; The act of shitting

Variations:

Dump Lumps

Yo bro I'll be right back I have to dump a lump.

I have to dump lumps right now.

Dump a Lump by Ruppthritis June 15, 2011

Dump a lump 

When you need to pass a stool, have a poo . Conceived by Eddie Kirwan

I’m just going to dump a lump

Dump a lump by Mischief Kirwan November 29, 2018

dumpalumpa 

n.

a poop that is so bloody huge, you could swear it's going to get out of the toilet and beat you to death.

"Holy shit! Look at the size of that dumpalumpa!"

dumpalumpa by OrisisFrost November 24, 2005

dumpalump 

To take a shit

ie: dump a lump of shit out of your asshole!

"Oh shit, I'll be back! I have to go dumpalump!"

"Son of a bitch, I think I just dumpalump'd in my pants..."

dumpalump by The Guru Turtle January 28, 2008

Dumpalumpagus 

A mammoth sized hairy shit.

I wouldn't go in the bathroom, I just took a dumpalumpagus, and it smells like a prehistoric swamp in there. I swear, I think I saw a pterodactyl circling the toilet.

Dumpalumpagus by Kenosha Joe August 1, 2012