The act of bringing a diseased goat into the bedroom and engaging in a threesome with said goat and your partner.
Bro 1:Yo, I pulled a lumpy goat on my girlfriend and she went along with it!
Bro 2: Wow , you're lucky. My girlfriend dumped me when I tried it.
Bro 2: Wow , you're lucky. My girlfriend dumped me when I tried it.
by BirdIsTheWord23 December 31, 2012

The action of half farting half shitting yourself to release the substance of a solid nugget of shit but staining your underwear at the same time
Person A: ugh I dont feel so well.
Person B: Do you have a lumpy stain?
Person A: probably... can you check
Person B: Do you have a lumpy stain?
Person A: probably... can you check
by charliethomas May 17, 2015

The act of A porn star spanking your ass with a magazine that has your face and likeness on the cover, and you flip her over and hit it red-assed and raw dog.
“Awww shit, Stormy Daniels just gave Donald Trump a Trumpy Lumpy”
“Naw way!”
“Yeah dawg, he hit that shit without a rubber!”
“Naw way!”
“Yeah dawg, he hit that shit without a rubber!”
by MyLump May 17, 2018

the physically impossible act of defacating without being followed or accompanied by urination, also known as the chezz rosterfield......although impossible, this act must be labeled
DISCLAIMER.....urban dictionary is not responsible for any instantanious combustion that shall occur during execution of the lumpy barney
DISCLAIMER.....urban dictionary is not responsible for any instantanious combustion that shall occur during execution of the lumpy barney
after three days of living in the desert without water and a healthy diet of prunes, Craig produced a classic lumpy barney
by manbearpig301 March 11, 2007

by prettyboy221 October 23, 2009

An accidental shit in one's pants so large several bumps can be seen through the back of their trousers.
After a night of heavy drinking and binging White Castle cheeseburgers, Douglas awoke with a headache and a lumpy passenger.
by Furbs November 7, 2020

Having a lump in your chesticles.
by Louise Fox March 21, 2009
