bungstretcher 

A large, thick erect penis--in other words, a horsecock.

Tom used his bungstretcher on my gloryhole last night. It left me with a big drooling gaper--I love it! : )

bungstretcher by Steph M. August 17, 2007

bungstretcher 

An unusually large diameter hunk of feces. One which hurts trying to get through the anus.

"Hey Jim, what were those loud screams coming from the bathroom?" "Duh Tom. I was pushing a bungstretcher."

bungstretcher by JD & MK February 10, 2008

International Buttstretcher Day 

A holiday celebrated every August 4, enacted by cs188 in 2016. Not much is known about it, but as the day's name suggests it likely involves stretching butts.

"WOO-HOO! It's International Buttstretcher Day, ha-ha-ha-ha! Awww yeah......awww yeah......"

International Buttstretcher Day by Arrceeay June 28, 2019

Bumstretcher 

someone who likes to stretch their bum, like their spreading penutbutter on a piece of bread

look at that guy he is such a bumstretcher

Bumstretcher by KA_TheLegend February 25, 2017