Bubble Diarrhea 

A term often used by your wise old uncle, sometimes drunk, used to describe a fart followed by a large quantity of diarrhea with its surface tension stretched until it pops, leading to a change of underwear.

Similar in nature to explosive diarrhea

Oh shit Bob, I just fart gambled and lost to a spurt of bubble diarrhea

Bubble Diarrhea by Fart Gambler November 17, 2019

Diarrhea Bubble 

Look under the word Db.

"Db!"
"At school? can you hold it?"
"It's a class four!"
"RUN!"

Diarrhea Bubble by Tyler Anawalt September 1, 2005