Similar in orgin to "cankle" (CAlf plus aNKLE) the "thuttock" is the seamless fusion between the THigh & bUTTOCK in a morbidly obese individual.
by Frasier Nutzov March 8, 2007
The area of the leg where the upper thigh and buttocks meet, but has little to no definition. It's like Cankles, only higher up on the leg.
I was an idiot and ran 2 miles on a treadmill when I can barely get from the couch to the fridge without wheezing. I think I pulled a muscle in my thuttocks.
by Ephemily January 17, 2013