PapaSnow's definitions
A rear end that is so defined that it resembles a hemisphere (half of a sphere). Also acceptable is the term "Hemisphere Butt"
Person #1: Dude check out the girl in the yoga pants!
Person #2: Oh yeah man! Awesome hemisphere rear!
Person #2: Oh yeah man! Awesome hemisphere rear!
by PapaSnow October 27, 2010
Get the Hemisphere Rearmug.