… a distressing pathological condition in which the thighs are suppressed and the buttocks spring directly from behind the knees, aptly described in Steiss’s nosonomy as Panpygoptosis.
Murphy, Samuel Beckett (1938)

This condition is also known as Duck’s Disease. There’s nothing to be ashamed about if you have it… if you’re a duck.

Now it’s not a nice thing to make fun of someone because of their physical features. So if you’re trying to be really mean, you’re on the right track. Some one, or thing, that has very short legs can be said to have panpygoptosis.

If the target of your insult reads this blog, they will be offended because the meaning is known. If they don’t read this blog, they will be offended because the meaning is unknown. Looks like panpygoptosis is a a guaranteed offender.

Perhaps you could use a form of this word for less offensive purposes. “Do you have a chair that’s less panpygoptossicky? I’m basically sitting on the ground.”

Callipygæ and women largely composed behinde.
Pseudodoxia epidemica, Sir Thomas Brown (1646)

Because a shapely posterior deserves a word just as bootylicious.

While bar hopping with friends, do you worry about talking about a woman’s physical features without her hearing? Fear no more. “Bro, Check out that callipygian female!” Or you could use it as a noun… because I say you can. “Don’t look now. Callipygian: 9 o’clock!”

Ladies: Baby got back? Does your callipygous behind bring all the boys to the yard? If you ever hear “Damn girl! You is callipygian!” You know the man has a very large… vocabulary.