(1) Atrophy of the ass.
(2) Extreme weakness of the buttocks.
When sitting too long, the buttocks can become numb and the butt muscles can stop working properly therefore resulting in what is known as 'ASSTROPHY'.
"Dude! I am totally experiencing asstrophy right now."
I don't knowwhat's wrong doctor. I never get to go out with my friends anymore or watch the game on the weekend. We’re always doing things with my wife’s friends. We joined a book group and go clothes shopping together. Hmm, sounds like a severe case of testicular matrophy to me.
A serious and clinical failure of the muscles. Also a lethal disease that ravages cows, birds, and various specimens of penguins. There is no cute except for the milk of the hoopa tree.