he dropped his shorts and then made everyone in the locker-room pass out from the sight of his clamshell anus
a congenital deformity in which the buttocks can open up like the shells of a clam, with anus inside as a clam would be inside clamshells
"he dropped his shorts and then made everyone in the locker-room pass out from the sight of his clamshell anus" What is the definition of "clamshell anus"?