A temporary condition suffered while defecating that follows a badcase of diarrhea; typically characterized by explosive flatulance accompanied by the release of particulated fecal matter and the remaining contents of one's intestinal lining.
Dude, I had sputter butt for two days after eating that bad sushi!
When your dump is on the cusp of your sphinct and your baloon knot begins sputtering out smallmoist farts in rapid succession until you have the chance to release your brown baby.
A case of diarrhea, usually following a night of drinking or Mexican food, in which the feces comes out in fast spurts, almost like when someone who stutters speaks and struggles to get words out smoothly.
I ate some Chipotle and had a couple of IPAs last night and woke up with the worst case of the stutter butts.