sphinctertits 

A birth defect where one has nipples or nipple like birthmarks on each ass cheek creating an image like tits for an ass.

Wow, are those nipples on her ass?
She has a great pair of sphinctertits!!

sphinctertits by Coho1989 July 24, 2009

sphincterite

A highly concentrated brown rock found between ones ass cheaks. The rock is caused by poo particles buildingup overtime to form a rock like substance.

ow! someone hit mein the face with a sphincterite!

sphincterite by poo 2 stink ratio July 28, 2003

Sphincteritis 

A viral infestation of asshole behavior. Extremely ubiquitous. No known cure but sure working on one.

Jeff was suffering from a severe case of sphincteritis

Sphincteritis by Dr. AntiSphincter May 17, 2010