Fart barking 

When the poo pressure inside your anus comes flying out so hard that it hurts your sphincter and produces a sound like a dog barking.

Quit fart barking so close to my head!

I'm gonna have to go sit on the toilet and fart bark.

I just fart Barked so hard, I need to blot.

Fart barking by Doctor Ramshackle February 27, 2011

Fartbarfing 

Having diarrhea; specifically, the act of expelling diarrhea

"I shouldn't go to the amusement park today. I've been fartbarfing all night after I ate diarrheadonalds."

"Oh no! Why did this happen today?! I can't be fartbarfing during my wedding ceremony!!"

Fartbarfing by Jessman January 22, 2014