Posiden’s plunge Share definition Flag When you sit down on the toilet and your testicle plunge into the water. Mother fucker! I just took Posiden’s plunge. How the fuck am I going wash my balls in the sink at work? Posiden’s plunge by RourkeEleven September 12, 2019 0 0 Get merch Get the Posiden’s plunge mug. Buy Now — $32.95 See more merch