Describes the incident in which you sit down in a port-a-shitter to take a dump and the sudden impact of your feces hitting the water causes an unsuspected tongue of blue fluid to leap up and lick your grundle.
Bob: hey man, how'd everything come out after that MRE?
A phenomenon occurring in portalets when a splash of the dyed-blue water comes all the way back up and hits the user, resulting in an unpleasant sensation and often a blue stain on the affected area.