Midnight Monorail Share definition Flag To poop in another's butt and then have that person poop it back into your butt, poopetually. Cindy and I took a ride on the Midnight Monorail last night, and I ain't talkin' about at Disneyland. Midnight Monorail by Twink13 March 29, 2009 0 0 Get merch Get the Midnight Monorail mug. Buy Now — $32.95 See more merch