thwart pluto Share definition Flag The act of manipulating the tip and opening of the penis in such a way that you speak with the mouth of the dick. Before sticking it in Sally's butt, Jerry performed a thwart pluto to impress his mate. thwart pluto by latter day taints December 8, 2013 0 0 Get merch Get the thwart pluto mug. Buy Now — $32.95 See more merch