A tumerous flabby gravity defying stomach which appears like a spaceship or flying saucer sticking out over the top of trousers. This deformity caused by obesity and extreme over-indulgence is also know as a spare tyre.
This should be another listed body shape like pear apple ect.
Margret can't get any trousers because she has a huge spaceship!
Margret couldn't fit through the doorway because her spaceship had too great a diametre.