To extend ones nipple; To use cosmetic surgery to extend ones nipple (usually about a good four inches)
Yuri would've loved to go to the mall with Wolfram but he was scheduled to get a nipple extension
To Extend Ones Nipple Through cosmetic Surgery. People who ask for nipple extensions usually would like their nipple to be a good four inches.
Bob: This is my new nipple extension. I got it because I would like my nipple to be four inches long.