Sphincter Cap Share definition Flag A device that is inserted into the anus that allows the user to whistle when they fart. I wasn’t able to whistle Dixie until I purchased my first Sphincter Cap! Now just a-listen! Sphincter Cap by FelixTheCat11 June 16, 2021 0 0 Get merch Get the Sphincter Cap mug. Buy Now — $32.95 See more merch
