A sexual act. When one has a strong bout of diarrhea, but is keen not to let it go to waste.
Instead the liquid is poured into a latex condom, which is then sealed around the base of the penis by any tape that will form a seal. (Duct tape kinda works)
At this point, one may proceed to deepthroat his woman- who may, or may not choose to, "Pop the balloon."
"The best thing that ever came out of Arkansas- besides the Walmart franchise of course- has gotta be the Ol' Arkansas mud plug."
Chuck Berry