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
A frecnh teacher named ms. prammagoire that has some abnormally hard nipples 95% of class.
Hardnipples YES YES YES YES....
by crazy-whitey-in-french-class April 27, 2004