hyposterous 

A thought of hypothesis that seems exceedingly preposterous

Jane's hyposterous was that the theory of Sea-floor Spreading and Earth expansion were connected.

hyposterous by The word makerzzzzz March 13, 2012

hiposterous 

Having extraordinarily large hips. A combination of hips and preposterous.

Not to be confused with hippoposterous.

Kim Kardashian may have all kinds of implants, but she's naturally hiposterous.

hiposterous by PBMax September 28, 2008