Nipple inertia 

the protruding nipples of a perky breast that defy gravity, temperature and logic, they point of their own inertia

you could see the nipple inertia through that wet T-Shirt

Nipple inertia by the tao of boobs May 16, 2010

Nipple inertia 

A made up term that has no meaning. Disregard first definition.

No you may not check my boobs for nipple inertia.

Nipple inertia by Not Tao's wife. May 18, 2010