a whole which is located in between the rectum and the vagina of a desert tortoise. Also classified as a "taint", to gain said mushhole, you must be vigorously rubbing said tortoise genatalia on a cactus for 9 hours straight.
My mom took me to Petsmart the other week, and we both witnessed a desert tortoise who suffered from MUSHHOLE! it was a sad day.
Friend1: Dude!! I finally slept with Sandra last night! When I spread her butt cheeks, her asshole was humongous and smelly!!.... friend2: you mean she had a mitchhole..... friend1:" yes you're right.... she had a mitchhole.