The excruciating pain one incurs when finally completing a successful bowel movement which feels as if you have just received an episiotomy in child birth.
To beat someone so bad that their ass becomes a jiggling mass of gel hanging off their spine, allowing you to rip it off and place it in their hands as they collapse into a heap of excruciating pain. After the beaten person finishes convulsing, you place their severed posterior next to their lips so that it looks like they are kissing their own ass while posting hilarious videos to social media.
Well, I was chatting with my friend Scuba7Hoods and I ripped a nasty fart. It sounded like someone had ripped open a loose flopping paper bag thus I coined the phrase and it caught on. I mean now the whole world likes to rip a bag of ass!