quarterhorse 

a female with "thick" attributes, like a rotund booty and thick thighs.

That girl is built like a quarterhorse.

quarterhorse by Kentucky Windage November 14, 2009

quarter-horse 

a horse who is famous for its incredible time in running a quarter of a mile

..
that quarter-horse ran a quarter of a mile. in .. 6 seconds!!

quarter-horse by HALEY12345 October 14, 2006

Quarter Horse 

A “Quarter Horse” is similar to a well propionate thick sister but more of a slender athletic build. Her body is flawless in every aspect…smooth soft skin, lovely face; hair is at right length for her body and looks good in what ever she has on!

Man ole gurl in that video is a quarter horse!

Quarter Horse by PMinister July 14, 2006