Butt Plug Sundae Share definition Flag When you let a turd out but your arse is so fat that it gets stuck between the butt cheeks and won't budge. Sarah: oh Mark, I've just delivered a butt plug sundae Mark: shall I reach in and scoop it out? Butt Plug Sundae by MMJK November 5, 2019 Get the Butt Plug Sundae mug.