nipplebirth 

It's when a female character in a hentai or doujin gives birth from the nipples (often bugs and such a like)

Am i about to give nipplebirth to these bugs?!

nipplebirth by Weeb crusader September 7, 2020

NippleBird 

A mythical creature with the finest milk for miles

Oh look at that NippleBird their bigger than mine!

NippleBird by Alaiajeldosyp August 16, 2021