baby duct Share definition Flag Another word for vagina. Can be pronounced in the USvis baby duct or UK is babby duct. it really doesn't matter example1: I put my dong in her baby duct.example2: she has a nice baby duct I want to put my dong in her.example3: she undressed and I have seen her baby duct. baby duct by iceloops September 19, 2016 Get the baby duct mug.