Bellybellenditis
The medical term for the resulting effect of a male being grossly overweight to the point where ones penis retracts back inside ones body.
"I've heard back from my GP with my test results, turns out I've got a severe case of Bellybellenditis!"
"Fellatio is an absolute nightmare with my other half, he suffers terribly with Bellybellenditis!"
"Fellatio is an absolute nightmare with my other half, he suffers terribly with Bellybellenditis!"