A nipple erection of the female body in while the nipple muscle gets hard due to being simulated by incredibily cold weather or sex.
While Sami was unconscious, Sami's dog gave Sami a hard nipple. Sami, thinking it's the girl of his dreams, enjoyed it.
by whats a hard nipple? June 07, 2009
by crazy-whitey-in-french-class April 27, 2004