by Brent H. (Lol Nicole) July 14, 2008
When a guy goes into cold water and his ballsack shrinks around his testicles, resembling a sideways hourglass.
by TheSavageSquid June 01, 2010
A side effect when the act in which two or more people engage in anal sex occurs. When a man inserts his penis into another's asshole, and then the person squeezes said asshole, the penis is then contorted into an hourglass shape. This is the hourglass effect
by Mike November 13, 2003