Butt crack barnacle
A close cousin to the dingleberry, butt crack barnacles involve small fecal matters that cling to the equator of anal shrubbery during the defecation process. Such large-scale delinquent turds have most often been cited in the human male species, although felines and canines are often privy to butt crack barnacles as well.
"I thought that Daisy's litter box needed to be fumigated, but turned it out was just my butt crack barnacles."