when one is holding in a #2 but they have to go so bad that the head of the fecal clump starts poping in and out of the anus as the person nearly shits themselves. much like a prairie dogs head poping in and out of its hole
yo man pull over. i cant make it to the gas station.
come on you pussy
no man seriously. im prairiedogging it.
shit man well im pullin over now, hold on. everything will be ok.