Nipple Plunger Share definition Flag A utensil used to suck out milk from a woman's nipple. Used the same way as a toilet plunger but smaller.....for some its the same size....or larger!!! Nipple Plunger by Andrew F April 23, 2003 0 0 Get merch Get the Nipple Plunger mug. Buy Now — $32.95 See more merch